Perhaps a new thought. . .
"I know that the handle bar drink holder I bought was for cycles. But I'm 84 yo. I no longer cycle. I put my drink holder on my Rollator (walker). When I get my breakfast bar in the morning, I put a glass of cold milk in the drink holder on my walker as I make my way to my home office. It takes two hands to walk with a Rollator. The drink holder makes it possible. Hey. . . What about one on your lawn mower handle? Does anyone mow lawns anymore? :)"