Siphon pumps are inexpensive, disposable hand pumps. AO-06439-10 06439-00 features a squeeze-bulb action while models 06422-20 and 06439-10 feature a bellows action for quick and easy emptying of containers. AO-06439-10 07079-70 creates a Siphon with a few strokes of the pump. Economical Siphon pumps are ideal for a variety of fluids adaptable to most pails and drums.