Review on 🎨 Convenient Custom Shop Pack of 12 - 16oz Paint Mixing Cups with Calibrated Ratios & Epoxy Mixing Cups Included by Kristen Reid

First of all, if you are using West Systems epoxy, note that it uses a 5:1 strength and these cups do NOT have this (at least in the 12 pack that I bought). Also, as someone else said, the volumes aren't too accurate. I figured the best thing would be to take the mug I'm about to use to the kitchen, pour water in it, and mark each level with a sharpie. Only then can you be sure that your concentration is right. Yes, it hurts, but it works. However, they boil down to regular heavy-duty plastic cups that (#1) have a flat bottom to ensure good mixing, and #2 don't melt when the epoxy cures.