Because there are enough dishes to wash each day without everyone grabbing a new glass every single time they want a drink, I came up with a system. Enter the Sharpie marker! We use canning jars as glasses (they're SUPER durable!) and if I want it to, the Sharpie washes right off with a Scotch Brite pad.
My children, as old as they are, found this to be about the greatest thing ever. What??? We're allowed to write our name on the bottom of the glass? You'd have thought I fell off my rocker the way they looked at me.
Since we drink water all day long, even with our meals, one glass per person per day is all we need now. And that is marvelous! It's also great fun learning to write your name backwards on the bottom of the glass so that it can be seen the correct way when looking down.