What are some alternatives?
When comparing Lookback USB and Lumzag, you can also consider the following products
linedock - Laptop Power Bank with 1 Day Autonomy, 9 Ports Hub & 1TB SSD
BAGOBAGO Backpack Chair - Sit down anywhere on your backpack
SuperSpeedBlazer USB 3.1 Gen2 - The fastest USB 3.1 with Windows To Go.
Adv3nture - 3-in-1 backpack with 32 features
Aurelius - Add, tag, organize and search all your user research notes
Claw II - World's smallest keyring multitool