This is the original meth cook addon that was used around 2015 on every server until it was removed from gmodstore. The addon doesn't include any custom models so NO content pack is required, surprisingly this addon didn't have any exploits from how poorly coded it, however there is a glitch with the stove and pot to where you can cook meth twice the speed
Extract the zip folder inside garrysmod/addons then edit the cfg file inside the autorun folder.