High-flow self sealing spill proof Surge valve provides a sip or a blast of water and features a removable nozzle for easy cleaning. Sleek single-wall design is light and compact. Unique grip groove and wall design makes it easier to squeeze. Bottle shape and size is compatible with most bike cages. Removable nozzle for easy cleaning and is dishwasher safe. 100% BPA free & food safe. Mindfully manufactured in Colorado. Lifetime warranty