The platypus duolock bottle a new flexible water bottle with dual locking cap the duolock softbottle 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 platypus duolock bottle features highly packable easily flattens and rolls up when empty saving space secure patent pending duolocktrade dual locking cap wonrsquot accidentally flip or twist