In this economy many people are looking for ways to save money. One is to prolong their products. For example, they may water down handsoap or cut open a tube of toothpaste to scrape all of the toothpaste out. These things are done to ensure every ounce of product is used before buying anything new.
girl 1: There is no more handsoap left.
girl 2: Sure there is! (fills up the soap bottle with water)
girl 1: The handsoap is water-downed now! Stop being a product prolonger and toss the bottle in the garbage!