FOR BIG SIPS ON THE GO. We simplified sipping with the Rambler® Bottle Straw Cap. Just flip it open, take a sip, and close it tight to stay moving. It's leak-resistant, easy to carry (thanks to the TripleHaul™™™ Handle) and accommodates our wide straw, so you get more drink with every sip. The Straw Cap is compatible with all YETI RamblerⓇ Bottles. Use the measurements below to cut straw according to your bottle size. 355 ML-11.7 CM 532 ML-16.8 CM 769 ML-18.4 CM 1L-20 CM Please note: Do not use the Rambler Bottle Straw Cap with hot or carbonated beverages or for storage of food or perishables.