Peak Design Outdoor Sling 7L, Black, Padded Adjustable Shoulder Strap for Crossbody or Waist Carry, 10 Pockets, Ideal for Carrying Cameras and Essentials, Versatile Sling Bag for Men and Women

https://a.co/d/09vYoKI1 I recently got this and I like it. It expands up to 7L. I travel with a 4 yr old and it holds a lot of stuff. There are smaller versions of you don’t want something this big.