Foam Fire Extinguisher
Foam fire extinguishers are one of the most common types of fire extinguisher and are generally used for fires involving flammable solids and liquids.
Non-toxic, non-damaging to most materials, largely safe if accidentally used on electrical fires (although this is not recommended), designed to prevent the re-ignition fires, lighter in weight than the equivalent water extinguisher.
Damaging to electrical appliances. Dangerous if used on cooking fires or flammable gas fires.