I love my Osprey. I visit 1-6 schools per day for work, so it spends a lot of time in my trunk or on classroom floors. I think I've had it about 18 months and it shows no signs of wear, despite carrying tools in one of the side pockets- that's what killed my previous backpacks. I also have a Kipling that still looks great after 10+ years, but i only use it for travel.

For pens, i really like the sharpie rollerballs.

I’m currently using their Daylite Sling as my EDC bag and it’s fantastic. I convinced my dad to get a 40L backpack from them and he’s been extremely happy with it. Everyone else I’ve known who’s had a bag from them has raved about how good it is.

Personally I think you can go on aliexpress and buy any one of dozens of designs. They’re all made in China just white labelled.

If you like brands, zojirushi is quality. I hate the brand but yeti does have nice features on their bottles. Kleen kanteen also good. But they’re all pretty similar.

Laken thermo bottle. Stainless steel. Keeps liquids cool/hot for ~4 hours. Built like a tank, it has gone flying from my backpack pocket multiple times - once it rolled on the ground for 50 meters when I had a bike accident. Still works after 10 years, using it daily.

Contigo are pretty good plastic ones that look a bit nicer. If you want metal, I have a few from Stanley that are great at keeping stuff iced for literal days, but they’ll obviously be heavier. They’re also more expensive too.