A small box, made of crystal clear plastic with many uses. We deploy them extensively for egg incubation - just line the bottom with tissue paper so that the larvae have something to grip to after hatching. They are also ideal for sending first or second instar larvae throught the post, and for field trips should you come across something interesting whilst out walking. As for all plastic boxes used to contain livestock, please ensure that they are kept at room temperature in shady conditions to prevent moisture build up.