stupid / useless inventions

I was looking to find stupid/ useless inventions for another forum and was wondering if you know of any?

to start off:

Solar Powered Flash Light

Glow in the dark sunglasses

Inflatable Anchor

Waterproof sponge

Waterproof Teabags

AC adapter for Solar powered calculators

Fireproof Matches

Battery powered Battery Charger

Hand powered Chainsaw

Inflatable Dartboard

Silent Alarm Clock

A Pedal powered wheelchair

Braille Drivers Manual

Double sided playing cards

Ejector seats for Helicopters

Salted bandages

Fire Alarm with a snooze bar

Can opener in a can

Camcorder with braile-encoded buttons

Electric banana straightener

Flavoured suppositories

Ice skate sandals, for use in hot climates

Inflatable PC -- The Ultimate Laptop

Luminous sun-dial

Money with negative face value

Parachute that opens automatically, upon impact

Sundial with glow in the dark markings

A glow in the dark combat uniform

or create your own if you fell like it.

I don't care what you say, making things glow in the dark that don't normally glow in the dark will always be cool.

edible pants

the use is that you can eat them.

how do you where them after you eat them.

escape haches for jail cells

Although that's counterproductive, it's not useless, for the prisoners anyway.

bullets that when shot into mouth taste like CHERRY!

you "make" a new pair...
it's functional... kind of gross though.

Could you not just suck on the bullets, and get the cherry flavor that way?

floating carpet

dehydrated water.
"Just add water!"

Opaque windows

they hav edible pants?
thats kinda weird

cellfones that can only recieve calls and from only 1 person

Compact Disc Breaker disguised as a disc repair device...(Yes, it happened to me...)

wow that wud b a hell of a prank present

Toilets that don't deposit the poo!