18 Plastic Breeding Bottles 【Large】1 bottle Diameter: 150mm x Height: 150mm Measurements are approximate. Please check the photos. Some staining. The lids are not screw-on, but snap-on. 【Medium】1 bottle Diameter: 120mm x Height: 120mm Measurements are approximate. Please check the photos. Has sticker residue. 【Small】16 bottles Diameter: 120mm x Height: 100mm Measurements are approximate. Please check the photos. Marked with magic marker on the back. Chewing marks present. Used for raising stag beetles by my family until a few years ago, but no longer needed, so I am selling them. I am not knowledgeable about insect breeding, so I cannot answer questions beyond what is visible.