My bassoon players love them.

First, you can’t quite see in the picture, but the cup has markings on it for the volume of water, with markings at 30 mL, 45 mL, and 60 mL, as well as at 1 oz, 1.5 oz, and 2 oz

First, you can’t quite see in the picture, but the cup has markings on it for the volume of water, with markings at 30 mL, 45 mL, and 60 mL, as well as at 1 oz, 1.5 oz, and 2 oz