Reddit mentions of Koolertron Pro- Multifunction Mens Military Tactical Outdoor Nylon Shoulder Messenger Bag Handbags Briefcase Large Enough for Laptop/Sony/Canon/Nikon/Olympus/iPad (14", Black)

Looking for suggestions for a messenger style bag that can hold my laptop (Surface Book) as well as pack in my lunch for my work shift. Seeing if anyone know any messenger style bags that are made for this reason, or as close to it as possible. Thanks! Have been checking out bags similiar to the 5.11 Adult Side Briefcase.

https://www.amazon.com/5-11-Tactical-56003-Adults-Side-Briefcase/dp/B004V55PSW

Amazon similar bags:
Koolertron Pro- Multifunction Military Tactical Outdoor Shoulder Messenger Bag https://www.amazon.com/dp/B00YA1WKN0?th=1

Or GES Multifunction Messnger Briefcase
https://www.amazon.com/GES-Multifunction-Messenger-Briefcase-ArmyGreen/dp/B01M5DXF0H/ref=pd_sbs_147_4?_encoding=UTF8&pd_rd_i=B01M5DXF0H&pd_rd_r=89MVYFYZ5S174SV7FV3C&pd_rd_w=1PJLg&pd_rd_wg=j3GMt&psc=1&refRID=89MVYFYZ5S174SV7FV3C

Again, looking for something that can not only hold and keep my laptop safe, but also pack in my lunch and keep that cold/leak proof preferably. I like the form of the messenger bag because of the ease in transporting it, ie carrying it over the shoulder.

I just returned from my first solo trip to new Zealand for 3 wks. I took eBags' Mother Lode convertible bag and this tacticool messenger bag- I like pockets!

Granted I had a rental car so I could- and did- leave stuff behind in there for convenience, but overall those two bags were capable of carrying everything I needed for the trip. I'm going to Europe for 3 wks in a little over a month and I plan to bring the same bags, or maybe an even smaller messenger bag b/c their cabin baggage restrictions seem to be stricter overall. Caveat: I'm a tiny woman w/ correspondingly small clothing.