WATER BEAR TACTICAL vacuum-insulated water bottles are made of high-quality food-grade 18/8 stainless steel, protecting the quality and temperature of the stored liquids. The heavy-duty interior coating repels lingering flavors to enable constant reuse without any after-tastes. Keep Liquids Hot For Up To 12 Hours: You can now take your coffee, hot drink or even hot soup with you on the go. Keep Liquids Cold For Up To 24 Hours: The bottle will keep  contents cool or ice cold for up to 24 hours. (All bottles come with two lids. one Flip top Spout Screw Cap Lid and one Flex Cap Lid)