WARNING: BE CAREFUL! If you use too much vinegar and baking soda, it could blow up and make a huge mess in your kitchen, or worse... injure you. It happened to me (not the injury, but the explosion). I can assure you, it is not fun to clean up. This is high pressure stuff you are working with. So, please consider safety glasses and doing this outside on your first couple tries. Please don't hold me responsible for the mess in your kitchen if it does explode.
Sorry about the crappy video.
See The Video Here
Step 1: Collect Your Materials
2 PLASTIC Bottles (preferably 20oz) With Caps
3 ft. (aprox.) of tubing, fish aquarium size
Drill Bit a little bit smaller than the tubing
Funnel (forgot to put it in the pic)
Toilet Paper... Yes Toilet Paper
Liquid You Want Carbonated
Note: Don't Use Glass Bottles, They Could Explode.