Double Wall Insulation: Keeps beverages at ideal temperatures for hours BPA-Free: Comes with a BPA-free Straw Lid that is dishwasher safe on the top rack Leakproof: Offers a tight seal to prevent spills and leaks; Not recommended for hot or carbonated beverages Cupholder Friendly: 14-22oz bottles fit most cupholders Limited Lifetime Warranty & Patent Pending