Gummy-bear osmosis lab — 3D-printable model preview

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Science & education Medium

Gummy-bear osmosis lab

Watch gummy bears grow, shrink or dissolve in four liquids overnight

Put one gummy bear on the millimetre grid in each bay and measure it, then cover them with plain water, salty water, sugary water and vinegar. By morning the water bear has swollen to twice its size as water rushes in through its skin by osmosis, the salty and sugary ones barely change, and the vinegar bear has started to dissolve. Measure them on the grid again and record the results. A classic science experiment in a neat tray.

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Size: 220 × 70 × 45 mm
Shape: Rectangular
Walls: 2.4 mm
Volume: 59.9 cm³
Est. weight (PLA): 74.3 g
Parts to print: 1
Category: Science & education
Made by: Krypto
Built in: 40 steps

What’s in it

Rectangular, 220 × 70 × 45 mm, with 2.4 mm walls
3 dividers
Raised text: “WATER”, “SALT”, “SUGAR”, “VINEGAR”
1 patterned wall panel (engraved)

How to print it

Print in white so the grid shows. Use 50 ml of liquid per bay and the same brand of bear in each.

Prints as shown on its floor, no supports.

Filament: at most about 74.3 g of PLA printed solid (roughly $1.49 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).

Questions

What size is the gummy-bear osmosis lab model?

The gummy-bear osmosis lab model measures 220 × 70 × 45 mm (width × depth × height). You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Print in white so the grid shows. Use 50 ml of liquid per bay and the same brand of bear in each. Prints as shown on its floor, no supports.

How much filament does it use?

At most about 74.3 g of PLA (59.9 cm³ printed solid), roughly $1.49 of filament at $20 per kg. Normal infill uses less.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.

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Make it fit your space

Change the size, walls, dividers, holes and labels of the gummy-bear osmosis lab model in your browser, then download it for your printer. Free, no CAD needed.

Customize this model