This cross section shows what exactly is happening on the inside of the base. There is a center cone that fits the rubber bell perfectly so it does not tip over. At the top of the cone are small grooves that help water flow down the cone into the reservoir at the bottom. The bell sits proud of the reservoir to aid in air flow into the bell. There is a small gap between the top of the base and the bottom of the bell that allows water to evaporate. This design is protected by Patent #D688,489.
Overall production image of the plunger with evaporative base.
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Plunger with Evaporative Base
Innovative plunger with integrated base that aids in the evaporation of water to eliminate mold and mildew.
