Twist-off Tritan top is shatter-, stain- & odor-resistant & converts bottle into 18 oz. tumbler. Stainless steel & vacuum-insulated for maximum temperature retention—keeps beverages cold for 12 hours. Non-slip silicone bottom provides quiet set-down on any surface Carry loop for easy transport. Large opening for easy fill & cleaning with twist-to-seal lid that helps keep spout clean BPA & lead free.