A slender bottle in BPA free Tritan Copolyester with a sensible cap. There is no more need to unscrew or sip to drink. Simply flip up the sealing cap and enjoy splash and drip free refreshment. Take care when packing! It can leak in a rucksack - the cap is easily opened. Naturally, the bottle can be completely opened for refilling or cleaning. Easily handled with the large ring and fits in most normal bottle holders - bikes too. With measuring scale for the accurate mixing of mineral drinks etc.. Ideal for those OTG - on the go.