Here are 10 perhaps strange or unexpected places to find an ooze. Some of the oozes will be very small ones, given the size of the container. In other cases, not every container material will be suitable for every ooze, so don’t put an ooze that can devour metal in a metal container. May of the places will come as a surprise to characters, and perhaps a nasty one.

1. Hidden in a sarcophagus.
2. Imprisoned in a sealed barrel.
3. In a large, lidded cauldron.
4. In the tubes and flasks of an alchemical setup.
5. Inside a hollow statue.
6. Inside a locked chest.
7. Inside a sealed bottle.
8. Inside a stuffed bear.
9. Inside a suit of plate armour.
10. When a water pump is used, the ooze comes out of the nozzle.

Gelatinous cubes are conscientious dungeon cleaners, eating up all that organic matter than can be found, including unwary adventurers. They cannot digest metal or stone, so what items of minimal or no value might be found inside a dead one?

1. Copper coin bearing the head of an unknown monarch. One edge has been sharpened.
2. Deformed-looking skull that is just a partially-digested human skull.
3. Flint arrowhead.
4. Iron bands that used to reinforce a barrel.
5. Oblong steel token, measuring 2″x1/2″ with “Admit One” etched into one face.
6. Odd-shaped piece of stone that turns out to be a nose broken from a statue.
7. One steel boot.
8. Steel funerary urn, open and empty, with “Mother” inscribed on it.
9. Threads of gold, all that survives from a gold-embroidered piece of clothing.
10. Twenty-five studs, all loose, that were once set into a leather belt.