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Cello presents the Duro Series of Tuff Steel insulated bottles that you can carry with you on treks, hiking, cycling, to the gym, school or office with ease. Designed with new and advanced DTP coating the colour of the bottles will not fade or scratch with use. Enjoy an active lifestyle while your bottle stays brand new, even with everyday wear and tear. The Duro Tuff Steel Flip bottle is manufactured in food safe double wall heavy duty stainless steel. The vaccusteel technology ensures that the bottles retain temperature of beverages upto 24 hours so you can enjoy your hot or cold drink longer. The 304 grade stainless steel does not oxidize or leach chemicals hence keeping the beverage healthy at all times. Compact and designed for the get go, this bottle comes with an additional thermal jacket with carry strap for enhanced portability.