Plus, Add-On Accessory XL Extension Cup Holder, Larger Drink Capacity of 3.75" / 95mm, for Nalgene, HydroFlask, Yeti, Camelbak, Mugs, Wine Glasses, Tumblers (Includes 1) (Purple)

This is a great product idea.As well as the Robo cup holderThey are a bit pricey but they last for yearsThis is the second time I’ve purchased them the first time being when they first came out years ago, and they held up longer than I wanted to look at themOnly replaced because they looked like crap after eight years, but still held together strong

Great attachment to the RoboCup! Especially good for larger drinks and mugs for hot drinks!