ISI Certified Crypto Steel water bottle for office undergo rigorous testing for durability corrosion resistance quality control and material composition to ensure the best quality product reaches your hands Smart water bottle Hidden compartment to carry green tea bags medicines sugar this pexpo insulated water bottle is perfect water bottle for home office gym or travelling Double Stainless Steel Walls Highgrade stainless steel 304 Layers Which is known for rust and bacteria resistance This ensures lifelong durability covering both the outer and inner surfaces Hot And Cold Flask The wide opening makes it easy to fill clean and add ice cubesallowing you to customize your drinks and be leakproof and bpafree to ensuring your drinks stay secure and safe TriPly Vacuum Technology TPVT With two steel layers sandwiching a thicker aluminum sheet instead of a thin copper coat lastes longer and makes sure that your hot drinks stay hot and cold beverages remain refreshingly cold