Thanks to @spandit We've just put up a new How To article on how to make an Inner Tube Purse from a motorbike inner tube, they're readily available if you pop down to your local bike mechanics/tyre fitters.
To make your own have a look HERE
"Turn right way out again and finish with a piece of cord through the zip pull."
To make your own have a look HERE
"Turn right way out again and finish with a piece of cord through the zip pull."