SodaStream Source | $42 | Amazon

Some people can’t live without their coffee, but for me, it’s fizzy water. While supplies last, you can get a SodaStream Source from Amazon at the insane price of $42, complete with a small starter CO2 canister, and a mail-in rebate for a free full-sized starter canister. This machine is very rarely under $50, and if you regularly buy soda or carbonated water at the store, it’ll pay for itself.