The best and most stowable bowl for outdoor use. The flexible food grade silicone upper of this bowl is securely bonded to a rigid, cut-resistant base made of high temperature, food grade nylon. Unbreakable, folds flat for compact packing Food grade flexible silicone Calibrated as a measuring cup 12.5cm diameter x 5.5cm height Weight - 80g Volume - 650ml The silicone we use in our products has been tested and surpasses the Japanese Food Testing process, which is the most stringent standard available. This means that there\'s no foul taste, no BPA and can withstand considerable heat.