Fizzy Water Fans: If, hypothetically, you owned a Carbonating Device from a Popular At-Home Fizzy Beverages Company that has, at times, been "somewhat to extremely problematic", I am here to tell you that this company in Wisconsin will refill your CO2 canisters by mail:
https://www.sodasense.com/
https://www.sodasense.com/
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This article by Popular Science has more details on how to make one.
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