Silkworm Cocoon

How to Acquire
Once you have hatched your Silkworm Eggs into Silkworms, place them in another container (preferably a container that can hold at least double the amount of Silkworms you have, chests and cupboards work nicely), and add Mulberry Leaves as described on the Silkworm page until they develop into cocoons. Dropping a cocoon causes it to disappear.

Uses
A Silkworm Cocoon can be unraveled to produce silk filaments

A Silkworm Cocoon left for 24 real life hours will turn into a random-gendered silkmoth.