FEATURE - When COLD (Chilled or Refrigerated) liquid is added, the sport Bottle revealing the printed image strong, bright and Colourful. That’s why its called Magic Bottles.MATERIAL - BPA Free, Unbreakable, Durable, Metal Type - Stainless Steel, Lid Type - PlasticEASY TO CARRY - WEIGHT of Magic Bottle is 300 GM which allows your child to take it anywhere with him! Keep himself hydreated on any occasion, with a CAPACITY of 600 ML.Safe and Easy: Simplified stem and straw are child-safe yet easy to remove for cleaning. All parts are washable .Keep your child fascinated by pouring chilled water into the bottle and see the smile broadening on their face when the character changes colours. The science behind this is thermometric, which allows the change in colour due to change in temperature. BPA free with a capacity of 600ml, this bottle can easily be hooked to your kid’s school bag.