10,000 Brilliant Ideas

This is a bathtub that has the hot water circulate around a ceramic channel that's built into the tub (on the outside, but hidden) before spewing the water into the tub. That way your tub warms up as soon as you turn on the water.

Its an alternative to brushing your teeth. It would be something like a minty, rough textured soft candy thing. The same idea as mouthwash, only you can use your tongue to push it around and eventually just spit it out. It would need to be engineered with similar cavity and plaque fighting technology to toothpaste. Maybe even make it swallow-able for kids. Then they would hopefully be more prone to brush on their own.

I'm sure a little taste engineering could come up with a flavor of toothpaste that tastes refreshing without having such nasty effects when combined with orange juice.