I've got a similar rear rack on my Foreman that was made by Savant, has similar gridded paneling. What kind of cup holders did you use to mount on that? I'd be interested in mounting a couple on the rear rack of my bike. Thanks for any info.
The cup holders are made out of 3" PVC couplings with tie wraps on the bottom in an X pattern. Then we just drilled holes and mounted them to the screen on the racks. They hold cans in koozies but if you happen to drink long necks you will need a short piece of pipe to add to the coupler. I didn’t glue them in so they could be removed when not needed.