We store our sponge vertically in a glass with slanted sides. The sponge stops about 1-1/2" before the bottom. The sponge drips dry after every use, depriving b

We store our sponge vertically in a glass with slanted sides. The sponge stops about 1-1/2" before the bottom. The sponge drips dry after every use, depriving bacteria of the "wet" they need to thrive. It surely doesn't kill all bacteria but it takes about 2 months before the sponge gets into the ewww zone, which from my standards, greatly extends sponge life over storing them flat.