Made From Bamboo  - High natural strength & durability. Eco-Friendly  - Organic materials; recyclable and biodegradable A Reusable Alternative to Paper Cups  - Help cut down on pollution and waste Capacity: 350ml Diameter: 80mm Height: 110mm Yellow Head  Made of food grade silicone. Wash thoroughly before initial use and after each use. Do not microwave. Sippy cup lids are completely spill proof until there is pressure on the spout, as the spout only lets liquids out when it is being sucked on. Personalised Cup and Silicone head only. (PLEASE SUPERVISE ALL BABIES AND CHILDREN WHILST THEY ARE USING THIS PRODUCT)