The Dispensette? S bottletop dispensers build on the 50 year history of BRAND dispensing expertise. Continual upgrades makes this the safest and most convenient ever, while retaining the features making the Dispensette? the world’s favorite bottletop dispenser. The “floating piston” design of the Dispensette? S forms a zero-wear sealing system with outstanding sliding properties. Optimized flow channels make dispensing and priming even easier – particularly in instruments with large volumes.