One of the main reasons people love the SodaStream is that you save money by making your own sparkling water. Supposedly. Unfortunately, replacing those CO2 canisters is expensive. This clever hack will help you cut those costs by a huge margin.
The owner of Critical Paintball came up with SodaMod, which is a custom valve that turns the refillable CO2 canisters used to power paintball guns into the firepower in your countertop fizzy water fountain. As the video points out, SodaStream canisters use a proprietary one-way valve with non-standard threading so they're impossible to refill without SodaStream's help. Sending back two 14.5-ounce Carbinators for replacement costs $60. Outrageous! The cost adds up after a while and cuts into the money you'd otherwise be saving with your SodaStream.
By contrast, at your local sporting goods store a CO2 canister refill costs about three bucks. So it's easy to see that cost of a $60 SodaMod plus a $15 CO2 tank pays for itself in no time. The SodaMod requires a some basic installation, but it's certainly worth your effort. [SodaMod—Thanks, Edgar!]