Refilling SodaStream CO2 tanks inexpensively using pelletized dry ice instead of the costly prefilled exchange cylinders. Preview and download a free copy of the soda cost spreadsheet I mention in the video here: https://drive.google.com/file/d/0B5DyuVvuODctb04zWVVzYXFSYWs/view?usp=sharing
Some have asked for clarification on the pelletized dry ice. It's used for 'sandblasting' in construction and by road repaving crews when they take core samples (typically in the summer). Also heavy equipment repair sometimes uses it to chill (and shrink) track pins so they can be replaced more easily. Look in your local directories under 'industrial gas' suppliers and I bet you find it there. Good luck!
