4.2 oz, replacement inlets and outlets available - but this almost indestructible!
The LiquidAider pump moves 1L / minute out the nozzle! The rechargeable battery lasts for 40 liters of water before needing recharging. It is made of food grade plastics, fits any water bladder and any backpack, even children's ( as shown on the website).
Thumbscrews provide easy cleaning of impeller - safe with all hydration products.