I’m on a commuter / hybrid and this works great
VLTAWA Bike Water Bottle Holder... https://www.amazon.com/dp/B089B18CMR?ref=ppx_pop_mob_ap_share
Creative, but I highly recommend this one instead. Holds everything from a 40oz hydroflask to an open can of beer, thermally insulated, and it even has a cell phone pocket and loops for carabiners. Plus it doesn't take up precious basket space.
Check out this cell phone holder too I just bought. So sick that it holds my phone securely, charges it wirelesses, and even allows me to record my rides like a dashcam.
VLTAWA Bike Water Bottle Holder... https://www.amazon.com/dp/B089B18CMR?ref=ppx_pop_mob_ap_share