What"s the secret to fast, air-free formula? This smartly-designed formula mixer! No clumps, no mess - just smooth, well-mixed formula in a flash. And this mixing pitcher"s blades remains immersed, it keeps air bubbles out, aiding baby"s digestion. Mixes up to 32 oz. of formula, or four 8 oz bottles. Dishwasher safe. Just pump the handle up and down for smooth, effortless mixing Other mixing methods (such as shaking) add air to baby"s formula, which can cause gas and colic. But because these mixing blades stay below the surface, they can"t pull air down into the formula. The lid lock ensures spill-free mixing, while the adjustable locking ring keeps the blades from breaking the surface Soft grip handle is comfortable and non-slip Dissembles easily for cleaning; top rack dishwasher safe BPA Free