Lots of bubbles, less waste. I really like this soda maker because it is easy and inexpensive to make your own soda or seltzer and you don't waste a lot of plastic packaging. I have owned this for about 5 years, had a previous model before that. I use glass bottles and get the Co2 cartridges refilled at a plumbing supply house. Excellent product, although the glass bottles do tend to chip.