PornHD has compiled a list of masturbation techniques, including one I had never heard of before now involving a plastic bag...
2. Hello jello!
Manuel Ferrara told me about this one and though at first I was quite hesitant, when I decided to give it a try I was completely proven wrong. Grab any kind of bag you can, plastic preferably so you can toss it easily, and put warm jelly inside. Wrap it around your old fellow and jerk it as you normally would. The warm and gentle texture of the bag and jelly will create a feeling that’s nearly spot on. The best part about it is you can ejaculate inside then throw it away. Easy clean up.