I’ve been using this growler as a mini keg to force carbonate beer. I know this isn’t the intended use of this product, but purchased it on a whim to try out this potential functionality. As a side note, I’ve also used this to carbonate non-alcoholic beer with great success; just takes a bit more than a single CO2 cartridge. The CO2 regulator works well, but can take a bit of getting used to. Pouring from the tap can also be a bit tricky at first; I’ve had my fair share of beer on the counter/floor, but I chalk that up to user error. There is a bit of assembly needed to get everything working, but the instructions that came with it made things easy. My only complaint is that the dimensions of this are slightly off what is depicted. I found mine to be slightly taller, and had to get creative to fit it in my mini fridge. All in all, a great product and would buy it again in a heartbeat!