I found this on-line and I think it’s amazing!
It holds your phone, your water bottle,
and probably a few other things.
My favorite part is the color!!

it’s called the

“Stretch™”

 The Stretch is the first stroller storage product designed exclusively for umbrella strollers. The unique flex material and tension fit design ensures a secure, no-slip fit every time. Easy-on and easy-off attachment gets you rolling in a snap. With insulated drink holders and multiple storage pockets for you and baby, you’ll have everything you need within reach. Just attach and go!