Polar Insulated Water Bottle (20-Ounce, Yellow) The Original Insulated Water Bottle - As the first to make insulated, BPA-free, plastic sports water bottles, Polar Bottle has had over 20 years to perfect keeping liquids stored and cool for twice as long. Ultimate Thermal Protection - The double-wall construction of our insulated water bottles creates a thermal barrier of air to keep heat out and cold in. Foil layers reflect solar rays for additional thermal protection. Dishwasher and freezer safe. 100% BPA-Free Water Bottles - Polar Bottle water bottles are and always have been 100% BPA-free and phthalate-free. Constructed of durable, lightweight and FDA food grade approved LDPE. Sports or Bike Water Bottle - Our 20 oz. size is great to pack in your luggage, bring to work, toss in a day pack, and or stash in the water bottle cage on a smaller frame bicycle. Its also a great sports water bottle for kids and fits in a lunchbox. Wide mouth accommodates ice cubes and makes it easy to clean. Removable carrying strap offers extra convenience. Made in the USA - Polar Bottle Insulated Water Bottles are proudly made in the USA to reduce environmental impact and support local economies. Designed to last, each one of our water bottles comes with a lifetime guarantee.