I present to you the assassin's teapot where the two containers are inside the skull, on the handle we have two holes where we feed the two containers. Blocking one of the holes with our finger, we can select the compartment from which we want to pour.The selected liquid will flow from the snake's mouth.

3D Printing Settings:0.10-0.2-0.3 layer height5 walls30-100%infill5 top and bottom layersI represented in a picture the ideal position for printing, it requires supports