Notorious Beam Team

Found on Liqurious but originally on Kyouei design

"it is a glass for drinking a lot.

a device consists of a bulb shaped container with the glass below.
when the amount in the glass decreases, a constant amount is poured from the tank into the glass.

never overflowing from the glass because of air pressure and water pressure."

Sheer genius. They also do very cool stuff with red wax which could be fun for Maker's Mark.