I have too many containers, so I'm offering them to those who need them. This size is perfect for transferring larvae from the first instar to the second instar. Young larvae can also start in this size. Also, for females of small species, it's possible to raise them in 800cc containers until the end. I used these to raise Japanese oak beetle larvae. These are used mushroom bottles. The bottles may have scratches from the larvae biting them, or scratches from washing. These are used items that have been used for raising larvae. Please understand that each bottle has various scratches, scuffs, and may have remaining mycelium or dirt. Please purchase only if you can accept this. I washed and dried them, and stored them indoors. Please understand that these are used items. [Product Description] Capacity: Approximately 800cc Set of 24! Due to the large packing size, they are not sold individually.