The Ultimate Growler is completely impervious to oxygen and sunlight and made from 304 stainless steel. This growler comes with a double wall vacuum insulation keeping your delicious beer cold for hours. The spring wired lid makes this growler capable of holding up to 30 psi. This kit includes a co2 regulator and co2 cartridge as well as the Drafto dispensing kit.  Keep your beer carbonated and fresh with the Ultimate Growler complete kit.