The Go Bag
How it works: The double plastic bag contains a pouch of dry crystals which swell to form a solid gel when liquid is added.
The top of the bag then seals over the lip and the bag can simply be thrown away.
"We are aiming it at festival goers because they have to encounter unsanitary situations," says Go Bag's Carl Rees.
"It's small, compact and easily disposed of - and you can use it in a tent which is better than stumbling around the campsite in the dark."
The Go Bag is currently in use by the US Army and in theory each bag can be used up to three times before disposal.