Cupholder that was requested for my friend's wheelchair. It has a 1.5-inch diameter mount for clipping onto the side with slots for zip ties to increase stability. There are drainage holes at the bottom.
Made to fit refillable water bottles so to fit smaller items like cans it can either be scaled down or add a foam insert to reduce rattling. Adding a foam insert will also help with insulation but be aware that it might block the drainage holes.