3D-printed products and 3MF downloads from Roxium in Burlington, Ontario

A hard hat that goes on a keyring - the dome, the brim and the little ridge down the middle, printed in one piece with a hole through the top. 1.5" across, and it works as a key tag or a desk charm.

Design by astavr

An impossible passthrough shaped like an hourglass: two halves that turn through each other and stay locked together. 2.8" tall, about 24 g of plastic.

Design by BeninManc

An impossible passthrough built as a pyramid: the parts pass through one another and no amount of turning lets them go. 2.8" tall, about 21 g of plastic.

Design by BeninManc

A pencil holder wearing a puffer jacket: quilted panels all round, with a zip, a collar and sleeves running up the sides. It holds pens, pencils, markers, brushes or small tools, and it is sturdy enough to be knocked about a desk. About two hours of printing, and the quilted panels take filament colours well - solid winter colours, pastels, or something loud.

Design by Sitsero

Two spirals in one print: an outer shell that twists one way and a core that twists the other, turning past each other as you fiddle. Printed in a single colour it reads as one tapering cone; give the shell and the core a colour each and the two spirals separate in the eye as they turn, which is what the designer's own pictures show. The profile that prints it is 0.2 mm layers, 3 walls, 15 per cent gyroid infill, PLA, no supports, standing upright exactly as supplied.

Design by NerdHerder

A printable reading ruler with an integrated bookmark pointer. The pointer holds your line while you read and marks your place when the book closes - pick the length that suits your book.

A gyro fidget spinner: three curved rings interlock around a centre post and whirl as one, so it prints in a single piece with no bearings and no assembly - just flick it and go. The rings are loose in their track out of the printer, which is the part that takes a few tries to get right and the reason this one gets measured before it ships.

A bookmark of a book with a coffee cup resting on the stack - flat, 3.7" tall, and thin enough that it does not mark the pages. Printed in one piece in about a minute. Shown as a render, not a photo.

Design by giessener

A flat floral bookmark: one thin spray of three openwork blossoms and leaves that lies between the pages and reads against the paper, marking the page without thickening the book. 5.9 x 4.4" overall and 1.6 mm thin, printed flat in one piece in a few minutes. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by Rankhispano

A pencil cup wrapped in overlapping scales, so it reads as a little pinecone on the desk while holding a fistful of coloured pencils. 3.3" across and 3.1" tall, printed in one piece. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by impresionao

A desk golf set in eleven printed pieces: a green you can rearrange piece by piece, a ball, a club and the furniture around it. About 3" a piece and 115 g of plastic for the set. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by SakiSale

A lidded storage box for microscope slides: the box and its lid print as two pieces and close over the slides. 3.4" x 6.9" x 1.3" overall. Shown as a render of the printable model, not a photograph.

Design by Asky

A hook that hangs over the top of a door - no screws, no drilling, nothing to fix to the wall. 2.7" wide and 4.3" tall, about 13 g of plastic. Shown as a render of the printable model, not a photograph.

Design by blunt

Four plectrum shapes, two of each, printed flat as one sheet: a teardrop, a jazz point, a wide triangle and a rounded standard, at 1.0 and 1.4 mm so a player can find the thickness they like without buying four packs. Each pick is about 34 mm long and the texture on the back of the thicker ones keeps a sweaty thumb where it belongs. Designed by SF3DPrints and printed under Creative Commons Attribution 4.0 (CC BY 4.0). Shown as a render of the printable model, not a photograph.

Design by SF3DPrints

A practice mute for trombone, printed in three parts: the long tapered body that goes down into the bell, the flared cup that caps it, and the small collar that keeps the two together. 250 mm long and 193 mm across the cup, so it takes a full-size bell. The cup is what does the muting, so the horn can be played in an apartment without the neighbours learning the set list. Designed by 烤肉大师 and printed under Creative Commons Attribution 4.0 (CC BY 4.0). Shown as a render of the printable model, not a photograph.

Design by 烤肉大师

Eight napkin rings shaped like sea creatures - starfish, shells and fish - each holding a folded napkin on its side. About 3" across, printed flat in one colour or several. Shown as a render, not a photo.

Design by adnamantino

A pick holder with four feet that stands on an amp or a desk: slanted slots take plectrums by the tip so they can be pulled out one at a time, and the block is 90 mm long, 28 mm wide and 12 mm tall. The slots are cut at an angle, which is what stops a pick sliding back down into the holder. Designed by gareth7562 and printed under Creative Commons Attribution 4.0 (CC BY 4.0). Shown as a render of the printable model, not a photograph.

Design by gareth7562

A rail that a CD jewel case stands in, ribbed along its length so the case leans back instead of sliding forward, on four short feet that keep the disc off the shelf. 149 mm wide and 30 mm tall - the width of a standard case, with a little room either side. Designed by ToToKia and printed under Creative Commons Public Domain. Shown as a render of the printable model, not a photograph.

Design by ToToKia

A napkin holder with an open frame: a stack of serviettes sits in the base and the side wall holds them upright, so you can take one without the rest following. 6.3" long, printed in one piece. Shown as a render, not a photo.

Design by Jyffen

A plate of music notes cut flat at 3 mm: single quavers, beamed pairs, a dotted note and the odd small rest, from 25 mm up to 67 mm long, so a wall, a noticeboard or the front of a piano can be dressed with them. They print lying down, which means no supports and a clean face straight off the plate. Designed by EcneNomma and printed under Creative Commons Attribution 4.0 (CC BY 4.0). Shown as a render of the printable model, not a photograph.

Design by EcneNomma

A shelf that hangs under a shelf: it clips over the front edge of an existing board and gives you a second tier in the gap, for mugs, spice jars or a router. 6.9" wide, printed in one piece. Shown as a render, not a photo.

Design by PanteraRuber

A plectrum printed flat at half a millimetre, 27 mm tall and 24 mm across, with the designer's design across the face - the pun in the name is the whole idea. Thin picks bend more than thick ones, so this is the one for strumming rather than for shredding. Designed by marshal.meacham and printed under Creative Commons Attribution 4.0 (CC BY 4.0). Shown as a render of the printable model, not a photograph.

Design by marshal.meacham

A capo in two printed parts: a jaw that sits across the strings and the lever that clamps it down, 92 mm wide so it spans a standard six-string fretboard. It goes on the neck above the fret and holds the strings at the new position, which is what lets one shape be played in any key. Designed by Kevdev, a remix of the Guitar Capo by HarleyPrints, and printed under Creative Commons Attribution 4.0 (CC BY 4.0). Shown as a render of the printable model, not a photograph.

Design by Kevdev

A planetary gear set printed in place: six small gears mesh between a sun gear and a toothed ring, so turning any one of them turns all the rest. It is 2.5" across and prints as a single piece with nothing to snap together. Shown as a render, not a photo.

Design by HurtTree

A desk caddy printed in one piece: a raised back that stands a phone at a reading angle, a round well for pens, and a square tray for a watch, keys or a card, with a slot for a charging cable to pass through. It is 7.1" wide by 3.5" deep. Shown as a render, not a photo.

Design by Maker76

A fidget spinner small enough to live in a pocket: one piece, no bearings, no axle to glue, printed in place so the two halves and their weights come off the plate ready to spin. It is a 15-minute print in the designer's own profile, which is why it makes a good giveaway or market-stock item. Printed in a silk filament the spinning face catches the light. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by DragonFusion3D

A hexagonal tube cut into one continuous spiral, so it springs and flexes in the hand and the turns of the helix roll past each other under a thumb. It prints as a single piece and needs no assembly, and it stands 2.8" tall by 1.3" across. Shown as a render, not a photo.

Design by NerdHerder

A T-rex that holds your page: the dinosaur stands on the spine of the book with its legs either side, and the tail curls over the top. It prints flat in one piece, 3.6" tall. Shown as a render, not a photo.

Design by UncleFlappy

A small hook that sticks to a desk or a shelf edge with tape or a screw, for keys, headphones or a cable. 2.6" wide, printed in one piece with a flat back that sits flush. Shown as a render, not a photo.

Design by schiko

A B2 in flying-wing form that sits on top of a joystick - the shape slots over the stem and pegs in, so it turns with the stick. 5.5" across the wings, printed in one piece plus two pegs. Shown as a render, not a photo.

Design by DeanPrinting

A phone stand that folds out of a keychain: the plate swings up and the phone leans back on it, and folded away it hangs on your keys. Shown as a render, not a photo.

Design by musielovsky

A hanging books-read counter: a sign with a row of numbers that slide into it, so the count can be moved along as the year goes. It is two plates - the sign with one of each number, and a second sign with the numbers again so the count can pass ten - and either can be bought on its own. Shown as a render, not a photo.

Design by ZHeights

A napkin holder with a voronoi lattice for walls - it holds a stack of napkins and looks like something grown rather than built. 5.1" long, printed in one piece. Shown as a render, not a photo.

Design by IvanChamberlain

Four stencils for painting a brick-built tree scene: layers that line up on a wall or a card, so the trunk and the canopy come out in register. 6.5" square, 0.8 mm thin, printed flat. Shown as a render, not a photo.

Design by Merilno3D

A squeezer that slides up the tube as it empties: the roller presses the paste forward and the key at the end hooks over a rail so the tube hangs. 2.9" long, printed in one piece with the edges rounded so it does not catch on the shelf. Remixed by Weisnetde from two earlier squeezers, all under the same licence. Shown as a render, not a photo.

Design by Weisnetde

Six coasters shaped like leaves, 70 mm across and 3 mm thick, each with a different vein pattern. Printed flat with no supports, and thin enough to stack in a drawer. Shown as a render, not a photo.

Design by jdormer9

A flower-petal stencil 0.8 mm thin, for tracing or airbrushing onto paper, cake or a wall. 3.8" across, printed flat in one piece - thin enough to lie flush on the surface. Shown as a render, not a photo.

Design by Merilno3D

Three stick figures in fighting poses, each one holding your pencil where it would hold a weapon: an archer drawing a pencil like a bow, a spearman resting on a long one, and a sniper kneeling with one as a rifle. The archer takes short pencils of about 8 to 9 cm, the other two take ordinary 10 to 16 cm ones. Sold as the set of three. Designed by Gekko and printed under Creative Commons Attribution 4.0 (CC BY 4.0). Shown as a render of the printable model, not a photograph.

Design by Gekko

A taiko drummer whose drum is the holder: the hollow drum takes cotton swabs, and the figure's hands hold one snapped in half as a pair of drumsticks. Four printed parts - base, figure, drum and the rack behind him - and the drumsticks take a touch of glue to stay put, as the designer's own notes say. Sold as the set. Designed by Benji and printed under Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0). Shown as a render of the printable model, not a photograph.

Design by Benji

A soap dish shaped like a leaf, with the veins textured into the face. The file carries two bodies - a flat textured dish and a deeper one - and both are printed, so you get the pair and can keep the shallow one for a sponge. Designed by Fiteropp and printed under Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0). Shown as a render of the printable model, not a photograph.

Design by Fiteropp

A top that keeps going: a heavy rim, a fine point and a printed handle to spin it between finger and thumb. 2.1" across, about 41 g of plastic. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by happybirthday

A fidget web: a lattice of hinged segments that folds through itself and comes back again, printed as one piece with nothing to assemble. 3.7" across, about 28 g of plastic. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by BeninManc

A pen holder clad in raised dragon scales, hexagonal all the way round, with a smooth inner cup for pens, pencils or brushes. 3.1" across and 4" tall, printed in one piece. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by 3DWoosh

A cone that passes through its own core and keeps going - a puzzle you can hold, printed in one piece with no assembly. 2.8" tall, about 19 g of plastic. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by BeninManc

A flat page marker with a fox carved in raised relief across its face - it slides over the page and the design reads against the paper. 9.4" long and 2.7 mm thin, printed flat in one piece. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by shadow.lune

An impossible passthrough in pentagon form: the inner shape turns through the outer one and cannot come apart. 2.8" tall, about 31 g of plastic. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by BeninManc

An impossible passthrough wound as a spiral: the helical parts turn through each other and hold, printed in one piece. 2.8" tall, about 29 g of plastic. The picture is a render of the printable model - real photographs of the print go up once the first one is made.

Design by BeninManc

A little hand that clips onto the page and points at the exact line you stopped on - so a bookmark marks where you are, not just which page. 2.8" long, printed flat with the fingers already free. Shown as a render, not a photo.

Design by helder.bernardo