You can buy an H2Glow for the safety of the little ones — though in the fine print of their installation PDF, Sector Labs points out that the H2Glow is not a safety device — or just because it looks really cool. It makes your water glow as it flows out of the tap, blue if it’s safe to touch and red if it gets too hot.
Measuring just 34 x 51mm, the H2Glow replaces the aerator on your faucet. For environmentally or economically conscience readers, it also limits the flow to 2 GPM.
The H2Glow runs $17 plus $5 shipping from Amazon. Two universal adapters to fit the H2Glow to your faucet are included, as well as the three LR44 batteries required for operation.