Unlike the other 3 SodaStream manuals, this one is electric (no manual pump) and works in seconds. It is our favorite because you can choose the level of bubble-intensity (low/med/high).
This bundle includes 2 CO2 cylinders, 3 carbonation bottles, and 2 varying fruit drops (play with flavored water). We like the plain, and just keep the bottles as a backup (they are not dishwasher safe!)
The CO2 tanks are super easy to replace and can be exchanged at Target or Bed Bath & Beyond for a discount. You can also hop on to SodaStream.com, print a return label and ship them back for free for replacement.