This cap fits all standard 15 litre bottles and stops water from spilling when rotating the bottle over onto the cooler. The valve opens and starts the flow of water when lowered into one of our cone shaped filters that fit into the top of your cooler or when lowered into a cooler with an open top in which the baffle disc must still be in place.
These are reusable and generally in a heavy use situation they should have a one to two year life.