I bought a black LeSportsac Saylor tote and lined the interior floor with some reflective Tenacious Tape so I can see inside the black hole more easily. I still use it with a mesh purse organizer since it doesn't have the best pocket layout.
https://www.lesportsac.com/products/...27fbb9ca&_ss=r

The top corners fold down with a snap so you can change it to more of a tote (vs box) shape if you have taller items. This eBay listing has better photos and size comparison https://www.ebay.com/itm/LeSportsac-...ss!95125!US!-1