My favorite hoodie has a bunch of features like this. Zipper is a bottle opener, it has various specialized pockets hidden throughout, the front chest pocket is designed to be a coozie/can holder, pretty sure you can run headphones through it somehow, it folds into a pillow, it’s lined with reflective material in the seams, etc. It is/was amazing, but it ripped in a way I haven’t been able to keep repaired after years of wear. :(