I've been looking all over for a good rain gauge, but I have had a lot of trouble finding one. Last year I bought the only one Lowe's had - a tiny glass tube with markings on the outside. It soon got broken and I don't know how. I'm guessing it could have been a stray shovel or rake handle - who know? I bought a second one just like it and everything was fine, until the measurements wore/washed off. Luckily there were some still on it when we did Ella's science fair project, but they were gone soon after.
In my search for a new rain gauge, I've found a lot of similar ones, or none at all. The other day I found a combination rain/sprinkler gauge. I wasn't happy with it at first, because it looked like the only way to secure it was with a stake in the ground. It was also too complicated for what I needed. You could also hang the larger rain gauge from a nail or screw, but from the top, which I think would interfere with its accuracy.