Apparently, air pressure and water pressure ensure that a consistent amount of fluid from the tank runs into the glass as the user drinks. I can see how that might work, but it doesn’t take a genius to realise that a glass vessel like …




Apparently, air pressure and water pressure ensure that a consistent amount of fluid from the tank runs into the glass as the user drinks. I can see how that might work, but it doesn’t take a genius to realise that a glass vessel like …