RevoMax Twist Free Insulated Stainless Steel Water Bottle with Standard Mouth Innovative Thread less bottle and cap - single-click, single-hand action to open, lock, drink or Refill Vacuum insulation, energy reflection inner layer and double-seal cap -keeps hot up to 18 hours, or cold up to 36 hours Powder-coated exterior with matte finish - durable, colorful and sweat-free Food grade 18/8 stainless steel and silicone rubber Seal - BPA-free, leak- free Free ice funnel included - pour in ice directly from most Refrigerator dispensers.Kindly refer the directions of use provided on the sleeve of the bottle to open the lock easily.