I got the flu recently, and as a result, I plowed through about 3 bottles of cough syrup and Robitussin. I recycled the bottles, but the dosing cups I wanted to keep, knowing they’d be good for something.
Turns out, I started a small project that needed some epoxy resin, so I used a dosing cup to mix my epoxy in. It’s a mini measuring cup for the resin, and I didn’t have to use one of my big mixing cups. Just make sure to wash it out really well before use.
I’m sure this secret is well known to surfboard repair guys, but it was a revelation to me that I wanted to share.