Frisco Gravity Refill Pet Waterer replacement cap

For a Frisco Gravity Refill Pet Waterer. You can buy a replacement cap for about $2. Reviews to the replacement cap said, and I paraphrase "the cost of the cap is about 1/2 when you including shipping" and "new cap and the threading barely worked."

on 11/29/2021 I revised to improve how water glugs up into the tank by inserting an air hole in the plug part. When I did this I revised the plug to come in two parts (three parts total).

70mm inner diameter. 15mm high inside. 17mm high outside. 78 outer diameter. Thread is a 3.6mm pitch.