This is simply the coolest pump dispenser available today. No seepage when open and no leakage when locked for travel. Lid locks and unlocks so you can pump clean fluid up from the bottle and then lock it for use. Simply wipe little upper bowl clean and either unlock the lid and pump up more fluid or keep it locked and toss it in your bag for safe travel without leaking. That's cool! By Menda, Holds 4 oz. of fluid.