These are very multi-purpose! Presumably they are to be used as waterproof bags to carry soiled diapers. However, we use them for all sorts of things; bathing suits, lunches, snacks, etc. - you name it. Waterproof and colorful, they close with a drawstring and toggle. Please wash these bags in lukewarm water and either hang to dry or dry on air in the dryer. No bleach or whitening agents.