Is there any cup holder or can holder or cooler that has flexible inner walls?

[conversant]

Hello

Is there any cup holder or can holder or cooler that has flexible inner walls so that it can accept cans and bottles of various diameter? What do you have any idea how to construct something like that?

Thank you.

Where for? They do expandable cup holders for cars or to attach to prams that hold different diameter drinks, not seen coolers though.

You can get neoprene can holders