dakine go go 6l mini backpack 365 Pack and a dedicated sleeve provides easy pump access Dakine Essentials Backpack Mini 7L

Available at The Garage Boutique for Kids and also at MadPax.

Lululemon also makes a slightly larger version of the Everywhere Belt Bag for $48 if this is a little small for your needs

The green crossbody strap adds a pop of color, complementing the black hardware and green lining

bottega venetaandiamo small leather tote - barolo-gold $4,055 This Bottega Veneta top-handle bag features an adjustable cross-body strap, a magnetic closure, knotted embellishment at the front, an all-over mini double-face weave, one main compartment, and an interior pocket

Do not tumble dry

Padding is pretty much essential, as it allows you to carry your stuff on your back without much issue