I walked through the bicycle department at Walmart this morning and found new cupholders available. I think the manufacturers finally realized we like to use insulated cups or bottles, not those cheap plastic ones previously available. One had an adjustable width and the one I purchased is large and has plastic pieces inside to grip the bottle, no matter what the size. A large insulated Tevis bottle will fit. As a bonus, it also has hardware to attach it to the regular handlebar. And, it also came with a bell which I never had on my bike. My method of notifying cars I was behind them was to scream. This might work better!