Best use of old innertubes

Use them to make diving suits for worms and small snakes.

Tape them to your body for a makeshift ghillie suit.

Combine with fingerless marigolds for a customisable washing-up glove.

use bits of them as patches for other ones.....or you could make mankini's outta them

no finer merkin for these cold january nights.

Use them as protective sleeves for one serving of spaghetti. Vary the tube size depending on how hungry you are.

My old sensei would tie inner tubes to a fire door in the dojo and practice his tiatoshi. You could do that....if you wanted to brush up on your throws.

you could fashion them into a nice dominatrix whip

Simply cut out the valve and hey presto!
A massive elastic band.

Collapsible hula-hoop.

Scuba suit for your Ouroborus

Cut a large number of tubes in half and apply some glue to one end.Stick on head for dreadlock hair extensions.

I used my old inner tubes to repair a leaky sunroof - Araldite + old innertube works a treat

Extra-chewy sausage casing

http://www.instructables.com/id/inner-tube-gimp-mask/

Avoid paying for expensive drinks in the cinema by tying off one end, filling with fizzy pop, then tying off the other end. Insert one tube down each trouser leg, then when the lights have gone down, undo your fly and pull the ends out, undo the knots, curl your head into your crotch, and vigorously rub your legs to pump the liquid into your mouth.

I just take in a bottle from the nearby offie.

Make a decorative and practical marble-holder by nailing one end to your wall, attaching a clothespeg to the other, and filling with marbles. When you wish to use a marble, simply undo the clothes peg.

Temporary clamps for glued together wood projects.

Landfill

Got to fill those holes with something...

http://www.velo-re.com/

can't believe no one has said Tourniquet yet.

Tourniquet.