VEVOR Beer Growler Tap System, 170Oz 5L Mini Keg, 304 Stainless Steel Pressurized Beer Growler, Keg Growler with Pressure Display, CO2 Regulator Faucet, Leak-Proof Ring For Draft, Homebrew, Craft Beer

Yes, it can be used for mixed drinks.

Thanks for your feedback.

Yes, but the pressure should not exceed 23 PSI, otherwise the pressure gauge cannot be used. If the pressure exceeds 30 PSI, the pressure relief valve will leak.

At 120PSI, the bottom will deform slightly, and it is estimated that the bottom will need more than 250PSI to bulge.

It can not uesd for nitro cold brew.

If you can find threaded 3/8-24UNF Nitrogen cartridge, you can use it directly. Nonthreaded nitrogen cartridge is very common in market, but doesn't work on this model. Another thing need to remind you, the relief valve is 30PSI, what is your max working pressure for nitrogen gas. The gas will come out when inside pressure reach 30PSI.