Wide mouth type for easy work. Breeding Containers Clear Bottles 28.7 fl oz (800 cc) with Vents (Lid Color: Clear) x 10 Pieces Suitable for Insects, Tropical Fish, Goldfish, Medica, Veta, Etc. This is the perfect container for breeding insects, tropical fish, goldfish, medica, veta, etc. The clear bottle allows you to check the contents, so you can breed while observing. The main body of the container is PETG resin, so it is more durable than PET containers. The lid is made of resin and the lid has a hole that makes it smaller as it goes to the outside. The outer hole diameter of the lid is about 0.02 inches (0.4 mm), and the inside is about 0.04 inches (1 mm), so it can be trapped in the inside of the flies. Even when stacked, the vents will not be blocked. Even if it falls, water will not spill out. Quantity: 10 pieces; Size (approximate): Outer Diameter: 3.9 inches (10 cm) x Height: 5.3 inches (13.2 cm) (when the lid is closed); Diameter: 3.1 inches (8 cm); Lid Hole Diameter: 0.02 inches (0.4 mm); Interior: 0.04 inches (1 mm); Material: PETG Lid: Polypropylene; Country of Origin: Japan