I don't know about the rest of the planet but in the UK were are always assaulted by catalogues of garabage falling through our doors etc.

Today my favorite useless thing was spotted in a catalogue

For in car safety a in car emergency tool with three features

1 a seatbelt cutter useful

2 A glass hammer also useful

3 An airbag burster Which is a sharp needle for bursting airbags. Erm yes wonderful

Sorry but i find this even funnier than the glow in the dark toilet seat