The Humangear GoToob+ is the original patented soft silicone travel bottle. The base design is contoured for stand-up filling and has a wide opening for easy filling and cleaning. The LoopLock securely locks so there's no leaks or messes and can be used to hang from a hook or clip to a bag with a carabiner (not included). The textured area on the collar can be used for labeling. Features: TSA-approved for carry-on travel. LoopLock makes it the only travel bottle with a locking cap. Contoured tube that can stand for easy filling. Textured area on collar for writing content descriptions. BPA-free, Phthalate-free, FDA food-safe.