This product has a unique design that can convert this 600 ml insulated Bottle into a 450 ml insulated Tumbler by just twisting the screw-top lid & putting the flip-top lid to change from bottle to tumbler mode. This product has a Screw-top lid for Bottle & a Flip-top lid for Tumbler which creates an air-tight vacuum seal that makes it convenient to carry for both Outdoor & Indoor Activities. It Can retain Temperature for Hot drinks for up to 12 Hrs & Cold drinks for up to 18 Hrs.
