ISI Certified Bottles Steel bottles undergo rigorous testing for durability corrosion resistance quality control and material composition to ensure the best quality product reaches your hands Multifunctional lid Flip lid for easy onehanded operation and easy to pour prevents any spills or leaks Cup cap provides versatility of drinking experience while in TravelOffice TriPly Vacuum Technology TPVT Between two steel layers sandwiched a thicker aluminum sheet instead of just thin copper coat for superior temperature control in the flask Dual SS 304 Layer The inner outer layers of our flask are constructed from smooth shiny SS 304 beholds rust free bacterial resistant anti crack property to keep your beverages safe Jute Bag Complimentary jute bag adds convenience for carrying your bottle anywhere office home picnics outdoors camping for personal use and gifting