Wash Bottles have an adjustable spray for every requirement. Set the nozzle on fine mist for TLC plates, position it to needle to rinse glassware, and pump a continuous, forceful jet on the big stream position for washing filters. The pump trigger is comfortable for one-handed operation, provides controlled delivery, and requires a very light pressure. Ease of use reduces finger fatigue when continuously pumping or rinsing a series of tubes. Contoured to fit in the hand, it makes the awkward-to-grasp, difficult-to-pump, and impossible-to-control squeeze bottle obsolete.