Independently tested and declared The World's Toughest Water Bottle, our sports bottles are lightweight and extremely durable. A noted favorite of professional athletes and active folks alike! These bottles will fit most cup holders & bike cages and our active bottle top makes drinking on the go leak-proof and easy! This eco-friendly bottle has a special leach-proof lining that will keep your beverage fresh and the taste pure long after the marathon or paintball tournament. Do your part, while you stay hydrated in style!