Cupholder to square carton adapter

Not everyone has the same round drink bottle. Some of us are a "square peg in a round hole".
So for those that drink from a carton, like juice or milk instead of a soda can or water bottle we have a special cup-holder adapter.
Typically printed in black unless you choose otherwise.
Optionally we can personalize it for you.
Car... home... home theater... gaming desk... stoller... grocery cart...
Made of a rubber-like material, will not scratch your furniture or car interior.