Sodastream Fizzi sparkling water maker, works w/out electricity
1 60L CO2 canister, may be getting low, refills/exchanges available online or in selected stores
2 bpa-free bottles with metal lid and base
This is the twist-in CO2 version (blue canister color), no electricity required, used for a while, been in storage so not sure how much is left in the canister, it did work when I tried it just now, but not sure how much I used before. Replacement canisters are online through sodastream, they have a subscription available. Some retail stores used to carry the canisters, I have not checked lately who still does. They do not make this model any longer, looks like they are moving towards the quick-connect style canisters (pink color canister) but still supporting the twist-in style. Canisters run about $16 each when you subscribe, they make about 60L of fizz water, depending on how fizzy you like it.
New online for anywhere from $60 to $100 depending on options/bundles
Asking: $20