Best to print in petg, no supports are required, but your printer should be tuned well.
I recommend 2-3 perimeters or whatever will print with no infill for the best results and a water tight print.
Dimensions are roughly 5x5 inches, minus the protrusion of the spout.
Holds roughly 25 ounces of water without spilling.
The author hasn't provided the model origin yet.