We R Spin It Resin Mixer

The cup only holds 200 mL, so won't work for large mixes. The mixer only seems to fit in the provided cup, so unless you order additional cups, you are limited. I had to put a rubber band over the top of the mixer and bottom of the cup to hold everything together, otherwise the mixer lifted itself out and fell over.
BUT, it mixes just fine, as long as you are aware of the limitations.