NEW Evolution range from One Green Bottle 350ml Evolution bottles are the absolute best. They have all the thermoregulation, temperature performance you need – 24hr cold/12 hr hot – and they fit the same size caps and straws as One Green Bottle classic tough canteens and curvy canteens. And as an added bonus, they look amazing, dandy, gorgeous, sleek…….. The straws inside these bottles are colour matched to the colour of the bottle and are made from food grade silicone and they have dots on them!! BOTTLES ARE SUPPLIED WITH THE NEW CLASSIC SPORTS CAP AS STANDARD. INTERNAL SILICONE STRAW PROVIDED. USE IS OPTIONAL. IF YOU PREFER TO TIP TO SIP WITHOUT THE INTERNAL STRAW – KEEP IT AS A HANDY REUSABLE STRAW. Vacuum insulated with triple wall stainless steel 304 construction and a condensation free exterior Beautiful and sustainable style. Perfect for refilling and reusing on the go. BPA and BPS free for safe, everyday hydration