First of all, thanks for wanting to contribute to the project!
Currently the best way to add your ideas into the game is by posting a thread with the tag "New drink".
A new platform is on the way thought and you can be one of the first to use it! Contact me at contact@masterpose.dev if you want to add drinks by your own!
The drinks work by having different effects that you can check right here.
Example of a post:
Hey guys! I think these ideas could be cool:
CURRY
Death: "Too spicy"
IRON
Message: "It tastes like blood"