This is my second Pixel Pocket Rocket. I like "PPR" because it's slim, well built, and has a shiny strap. I carry the bag over my shoulder so I try to keep everything as thin as possible, polypropylene doesn't add extra bulk. I don't know why more and more companies don't offer some kind of memory card holder straps. As a result, my memory cards always return to the same place and never accidentally end up in my pocket. A potential downside is that it's a soft case, which is never as protective as a hard case. But for my purposes it's perfect.
Neewer Black Memory Card Storage Holder - Waterproof, Anti-Shock with 14 Slots for Micro SD, TF, CF, SD and XD Cards
12 Review
TP-LINK UH700 USB Hub, 7.1cm Ports, Black
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IDENTIV USB Smartfold Type C SCR3500C
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High-Speed Transcend TS-RDF5K USB 3.1 Card Reader for SDHC/SDXC/microSDHC/SDXC Cards - Black
11 Review