Platypus duolock softbottle 075l new flexible water bottle with dual locking cap product details the newest innovation the duolock tm softbottle tm flexible water bottle features a groundbreaking dual locking cap for double the leak protection this flexible bottle is easy to fill and carry making it great for day highly packable easily flattens and rolls up when empty saving space secure patent pending duolock tm dual locking cap wont accidentally flip or twist open ave