The Brush and Rinse Toothbrush on the left features a concave back to create a mini-water fountain to your mouth so that no one will catch you slurping out of the faucet. Although you can purchase one for only $3.00, we understand that there are only 27 original prototypes in existence and that they are available for $1,750.00 each. We took our average toothbrush and attached a measuring spoon to the back with a twist-tie and it worked just fine. We suppose we could let it go for a mere $1,000.00, since our version is a one-of-a-kind and very slightly used.