Pogo's vacuum insulated stainless steel water bottle keeps drinks colder longer! Vacuum insulation keeps drinks cold up to 24 hours. Its leak-proof lid features a silicone soft straw with yuck-free flip cover that keeps the drink surface completely covered for transport. Its 18-ounce size makes it perfect for on-the-go. Hand wash water bottle recommended. Lid is dishwasher safe. Do not microwave or freeze.