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Models shared by the SO3D.xyz community. Open any of them in the generator to see exactly how it was built, remix it, or print it as-is. Browse the model library by category

Preview of Ethylene ripening bell
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Ripen a hard avocado overnight by trapping a banana's ethylene under a bell
Ripe bananas give off ethylene, the gas that tells fruit to ripen. Under this bell it cannot escape. Put a hard avocado, pear, kiwi or peach on the lid with a ripe banana beside it, turn the bell over them and the fruit is ready in one or two days instead of a week. Flip it back over to store it. RIPEN is raised on the lid, which doubles as the plate.
AR view Open in app
Preview of Shake-up ice-cream maker
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Make ice cream in ten minutes of shaking with ice and salt
No machine needed. Pour 200 ml of cream, a spoon of sugar and a drop of vanilla into the centre cup. Pack the 20 mm jacket round it with crushed ice and two big spoons of salt, screw the lid on, wrap it in a tea towel and shake or roll it across the floor for ten minutes. Salt drops the melting point of the ice to about minus 10 degrees, cold enough to freeze the cream as it churns. SHAKE is raised on the front.
AR view Open in app
Preview of Oldest-first tin dispenser
By Krypto
Complexity
Simple
MAIN PURPOSE: Load tins at the top and take them from the bottom so the oldest is used first
Shops rotate stock so nothing goes out of date; this tower does it at home. New tins go in at the top and drop down the stack, and you always take the bottom one through the arch at the front, which is always the oldest. A slot up the front shows how many are left, so you know when to buy more. OLDEST FIRST is raised on the front.
AR view Open in app
Preview of Crisp-or-chewy cookie jar pair
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Keep crisp cookies crisp and soft cookies soft in two sealed jars
Crisp and chewy cookies spoil each other in one jar: moisture moves from the soft ones to the crisp ones until they are all limp. These are two jars joined at the hip, each with its own lid, so their air never mixes. A silica sachet keeps the CRISP side snapping; a slice of bread in the CHEWY side keeps brownies and soft cookies soft for days, as the cookies take moisture from the bread.
AR view Open in app
Preview of Banana bodyguard case
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Carry a banana in a curved case so it never bruises in a bag
A banana goes into a bag perfect and comes out brown and squashed. This case is shaped like the banana itself, with a curved body and a slip-on lid, so it rides in a backpack or lunchbox without a single bruise. Three small vents in the floor let it breathe. BANANA is raised on the lid, in case anyone was wondering.
AR view Open in app
Preview of Tip-jar war
By Krypto
Complexity
Advanced
MAIN PURPOSE: Let customers vote with their tips between two rival answers
Baristas know a tip jar that asks a question fills faster. Two chambers sit side by side under one slotted top, with CATS on one side and DOGS on the other, and windows down the front show which pile is winning. Customers vote with every coin, and the rivalry keeps them coming back. Stick new labels on for tea or coffee, summer or winter, pineapple on pizza or not.
AR view Open in app
Preview of Jastrow illusion twin trays
By Krypto
Complexity
Medium
MAIN PURPOSE: Hold pens in two identical curved trays that seem to change size when swapped
These two curved desk trays are exactly the same size, but nobody will believe it. Laid one above the other, the lower one looks clearly bigger. Swap them over and the other one grows. It is the Jastrow illusion, found in 1889: your eye compares the short inner edge of the top curve with the long outer edge of the one below. Use them for pens and clips, and keep a ruler handy for the arguments.
AR view Open in app
Preview of Fibonacci golden-rectangle desk tray
By Krypto
Complexity
Advanced
MAIN PURPOSE: Sort desk things into squares that grow by the Fibonacci sequence
A desk tray built from the Fibonacci sequence: squares of 8, 5, 3, 2, 1 and 1 units spiral inward and fit exactly into a golden rectangle, the proportion of the Parthenon and the nautilus shell. The big square takes a notebook, the next a phone, then a stack of sticky notes, then cards, and the two tiny squares hold SIM pins and memory cards. Each bay has its number engraved in the floor, so the spiral reads as you clear it.
AR view Open in app
Preview of Meshing gear-train desk caddy
By Krypto
Complexity
Advanced
MAIN PURPOSE: Sort desk tools into three gear-shaped pots whose teeth really mesh
Three proper spur gears, each with ten teeth, stand in a row with their teeth genuinely meshed, as if they were about to turn each other. The tall one holds pens, the middle one scissors and rulers, and the short one clips and erasers. It looks like a piece of a giant clock on the desk, and it makes a great gift for an engineer.
AR view Open in app
Preview of Status-cube pen pot
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Turn a pen pot on its turntable to tell colleagues if you are free
Headphones on does not always mean do not disturb. This pen pot turns on its own turntable base, and each side says something different: FOCUS in red, OPEN in green, BREAK in gold and CALL in blue. Give it a spin so the right word faces the office, and colleagues know whether to come over or send a message instead. It holds your pens either way.
AR view Open in app

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