If anyone here is handy, Arvind Gupta uploaded a video explaining how to make a pump intended to inflate a balloon. With modification, the straw could be replaced with a tube to inflate a suit or a person. Very easy and cheap to make, and simple to operate-- to compensate for its small stroke size. Materials: Straw/Tube Film Cans Scissors Cello Tape Bicycle Tube Rubber Glue (just in case) 1. Poke a clean hole in a film can's base. This will form the suction valve 2. Take another can, and poke a congruent hole for the delivery valve. 3. Put another hole in the same can, near the bottom on its side, to make the hole for the delivery pipe 4. Push the delivery pipe through the hole. It should be a tight fit-- use rubber glue if necessary. 4. Take a 4cm strip of tape, and stick 1cm to itself. 5. Stick the tape to the base of the suction valve can so the doubled-up part lies over the hole. 6. Repeat 4. 7. Stick this one to the inside of the delivery valve can's lid. 8. Replace the lid on its can. 9. Cut about 7-8" of the bicycle inner tube. You can make this as long as you want honestly, but 8" works well. 10. Slide the tube over the lid of the delivery valve. The tighter the fit, the less leakage will occur, and the better your pump. The lid should face in. 12. Slide the other can into the tube. Again, the tighter the better! The taped end should face in. That's it: you're done! To operate, squeeze the inner tube to force air in one side and out the pipe on the other. You can use 2 hands for operation by rapidly squeezing the cans together and stretching them apart again. Inb4 "for the price of the materials I could buy one." It's about the inherent joy in making something yourself. Inflating seems so much more fun when I know that I put my time and work into it ^.^ Go to Arvind Gupta's channel for the video if this text guide isn't your speed. Happy bloating, ~ 13b^3 (^ Math joke. God I need a life :P)