Fire extinguishers can be a little clumsy to operate - not exactly what you're looking for in an emergency. But the new Flamestop is a breeze to use. It's a water-based liquid, so you're not left with hard-to-clean residue, and it snuffs out a small test fire in seconds from six feet away. The propellant is pressurized air (not aerosol), so it's environmentally friendly, and its compact size makes it perfect for small boats. - Steve Rosenberg