Revomax Vacuum Insulated Stainless Flask, 355ml / 12oz Slim

  One-handed operation, opening and closing in one second;  Double-layer elastic seal, no leakage; Super strong temperature lock, 18 hours of heat preservation, 36 hours of cold preservation; Can be filled with carbonated drinks and other gas-containing liquids, easy to open the lid; Safety lock to prevent misoperation and leakage. The Revomax 355ml/12oz Slim insulated flask has been designed to perfectly fit into any small car drink holder, school bag side pocket, or handbag. With a 67mm base and 355ml/12oz capacity, this little gem makes for the perfect lightweight travel flask.  Provide your little ones with just the right amount of water to stay hydrated while not weighing down their bags any more than required.