Review on 🔋 Convenient Maddog CO2 Fill Station: Dual Valve Bottle Refill for 12oz, 16oz, 20oz Tanks by Mark Marcellus

Works well and is very well made, doesn't leak unless the CO2 cools it down too much - the valves aren't designed for this cold (and the price would be a lot higher if they would be). Luckily, this isn't a problem if you follow the right procedure. I've seen videos posted describing how to use one of these and I disagree with some of them. Here are some tips I recommend: Empty the bottle completely before refilling it - I mean *completely*. No residual pressure in the tank. When the bottle is empty, put it in the freezer for a couple of hours. Fill the container as soon as possible after removing it from the freezer. This cools the CO2 entering the reservoir and helps it pull more CO2 out of the reservoir. With these tips I can fully load a 12 ounce tank without having to let off the gas - and it saves CO2.