This is the R2-D2 measuring cup set available from ThinkGeek ($20). The stacked cups actually make up his body, and his utility arms are nested measuring spoons! Admittedly, I bet R2 would be a great helper in the kitchen. C-3PO? C-3PO is not a good helper anywhere. "Target practice." I stand corrected.
Keep going for a couple more shots and a video, because some measuring cups need a video.
Thanks to TGILAM, hands down the best cookie baker in the galaxy.