Without question, the United mesh bag of Biz Class in the early 2010’s is the most useful and used amenity bag that I have. I am currently in-flight on UA 1460 EWR-LAX, and I have in my Rimowa Salsa computer case not 1, not 2, but 3 of those mesh bags which are holding cables of all kinds, a flat mouse, iPhone chargers, cigarette adapter chargers, a checkbook, even a spare iPhone!
Of topic, but I also have a prized Rimowa amenity kit from Lufthansa First that houses my Braun shaver, a comb, and nail filers.
All the other United amenity bags and tins are useless, even the latest blue sloping zippered bags, although these do have potential