O you multitask while you wait for the shower to get hot? Brush your teeth? Make the bed? Maybe even pick out your clothes or iron a collar? Many of us do—and don’t know that while we’re feeding the dog or grabbing that second cup of coffee, two-and-a-half gallons of hot water per minute are funneling down the drain. The automatic trickle reduces the flow of the water as soon as it reaches a comfortable 95 degrees. This way your hot water is no longer running down the drain while you’re away from the shower. The automatic trickle allows your showerhead to warm your shower without wasting hot water and tell you (hear) the when your shower is ready. Evolve is the leading manufacturer of this kind of products.