It is a beverage that grows socks on the feet of its consumers. It comes in a silver can with a red label that depicts an illustration of a sock with gray stripes within a green circle, as well as the product's name written in light gray letters.
Role in episode
While singing the song "A Day Like This," SpongeBob drinks a can of Sock in the morning to grow socks on his feet quickly. He is revealed to have a drawer full of this beverage.