An empty tub initially meant for butter that is used to hold a number of delicacies from Puerto Rico, including, but not limited to: arroz, habichuelas, arroz y habicuelas, arroz con pollo, sofrito, asopao, sancocho, and much more. Can often cause trust issues in children, due to the confusion of whether or not a butter tub will actually have butter in it. May also be found in Cuban and Dominican households.

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.