15ml/0.5oz conical measuring cylinder with spout

I had an aerosol that I use in the garden that is made from concentrate. The concentrate is powerful stuff, so no way I'd like to use stuff from the kitchen to measure it. The top to the aerosol sprayer is also very narrow.

So I designed this simple measuring cylinder. The wide top makes it easy to pour the concentrate into; the conical shape means I can clearly see when it has the right amount (indicated by the groove 2/3 of the way up). The spout helps to pour the concentrate into the aero