Bubba 24 oz Envy Mug Bluebird Dual wall construction creates a insulating barrier, keeping beverage inside bottle from changing temperatures Features spill-proof lid with smooth comfort lip designed for easy drinking and convenient one hand operation Perfect for at home, at work, at the beach or pool Includes 100% food grade silicone straw; mug does not "sweat" Iconic bubba shape "inside" that consumers have grown to trust; Top rack dishwasher safe