The main product this store sells is water. But any good Davisite knows that drinking the tap water is not a tasty proposition. The water at H20 to go is filtered by reverse osmosis, getting rid of all the hard minerals that give Davis water its funny taste. Bring your own containers for refills, less waste than buying water in 1 gallon jugs in the store, and cheaper than having it delievered. The clerks at this family owned business are always very friendly and helpful.