Soda stream refills

[Irving]

I'm confused.

[68Charger]

Just keep in mind the quality of the CO2, no matter what the source is... industrial grades have a level of contaminates like benzene that you wouldn't want to consume.

Just ensure it's beverage grade.
https://www.co2meter.com/blogs/news/...g-is-important

[68Charger]

I'm confused.

https://sodamakerclub.com/diy-refills/

Again, make sure the dry ice (or other source) of CO2 is food/beverage grade

[Jer]

I'm confused.

When dry ice melts you're left with a gas... CO2. I've done this countless times over the years & it works flawlessly.

WARNING: This can be VERY dangerous if you don't take your time & apply common sense. Items can be under pressure if you don't do steps properly.

Completely drain your canister once you feel it's "done" by depressing the fizz button fully multiple times until you hear no more noise at all & then open the little pressure valve on the side. Use a crescent wrench to slowly remove the entire valve assembly. Slowly. Now, smash up some food grade (most all sold by grocery stores is by default) dry ice & pour into the top using a clean funnel. Once you begin this portion you'll want to move quickly & don't handle the canister or the ice w/o protection. Once the dry ice is in it, screw the valve assembly back on & tighten the little pressure release valve. Now I set it someplace safe wrapped in a bath towel out in the garage. This way if anything bad happens (super unlikely if you use common sense) it happens away from people or expensive-to-fix pretty things. The outside will condensate a great deal as the dry ice melts so take that into consideration too or you'll have some turbocharged glass sweat rings to deal with. If you fully wrap in the bath towel until it reaches room temperature this won't be an issue.

Check the rubber o-rings each time too as they can become dry & brittle from what I've read online although mine are holding up fine for many years now. Replacement o-rings can be had from Amazon for a few bucks.

As I recall it's roughly 16oz for the 60L bottle & most stores charge like $1.49/lb for dry ice.