cups, jars, general tupperware, appropriate size, after a while you kind of get a "feel" for what size is appropriate i guess. i've found that starbucks have some nice sized cups, what frappuccinos and cold drinks come in, dont ask for foam though cos they give you a domed lid. but yeh they do good sized cups, i'm sure any other coffee shop would. how big were these cups? i imagine "cups" to be a perfect size for L3-4. also depends on what species of mantis obviously.