Highly reccomend a MOLLE water bottle pouch for the Backpack. : r/LinusTechTips

CCW Backpack 1000 Denier Nylon Laptop Backpack

I can't wait to show you this! - LTT Store Backpack

Tactical MOLLE Compatible Water Bottle Pouch, Multi Cam — G MILITARY

Tactical Molle Water Bottle Pouch

Tech Sack – LTTStore

Gonex Tactical MOLLE Water Bottle Pouch, Drawstring Open Top

MOLLE Water Bottle Pouch

What's In My Tech Bag 2022 - New Linus Tech Tips Backpack

Linus Tech Tips Backpack Review (My take on this controversial bag

Backpack – LTTStore

MOLLE Water Bottle Pouch Triple Run – Blue Ridge Overland Gear

ZXXSFM Molle Water Bottle Holder Molle Pouch Carrier

【Simple Style without Accessory Pouch】 Drawstring Open Top & Mesh Bottom. Height is flexible, so you could also use it to hold your umbrella.

Gonex Tactical MOLLE Water Bottle Pouch, Drawstring Open Top & Mesh Bottom Travel Water Bottle Bag Hydration Carrier