What's on the inside to secure the cups?
I rigged up a cup holder for Cokes from the fast food.places.
Are those Bridgestones on that thing?
I put two of the cheap cup holders from Wal-Mart. The kind that slides over the window or door. I screwed them on a 2x4 to level them out against my thin case. I can just slide it out for other uses when not needed.
You are correct Bridgestone TW203 and TW204.
Probably the old boat type with swivels would be better but I think a pack of 4 cup holders that I used was about $4.00. That is a battery case on the back of my bike it is in. It is mounted on with the 3 screws on that back panel behind the seat.
So you sit backwards when eating lunch? Wouldn't it be easier to use the tables and chairs provided?
instead of fast food drinks you could fit a couple 'tall boys' in there