Heres a pick thats both functional and full of heart.

A travel pack ready for several months of passport-stamped adventures with a detachable daypack, built-in safety features and a comfortable carry.

• Protect and organize a phone, sunglasses, cords and small valuables in
  the SafeZone compartment
• Keep money and a passport safe from pickpockets in the covert
  CashStash compartment hidden under the SafeZone
  
• Navigate day trips with the removable 20L add-on daypack
  complete with 15" MacBook storage, a breathable backpanel, mesh
  storage pockets and a covert CashStash pocket for money and
  personal items
  
• Every bag in this collection is bluesign certified. Bluesign is a
  strict international criteria that ensures the protection of workers,
  consumers, and the environment.
  
• Enjoy a hands-free, balanced and secure carry by attaching the
  add-on daypack to the front of the shoulder straps
  
• Prevent wear and tear by tucking away the contoured shoulder
  straps and hipbelt when not in use
  
• Deter theft with passive locking systems on the SafeZone and main
  compartment as well as lockable zippers and zipper pulls (locks
  sold separately)
  
• Belongings are held securely in place and organized with internal
  compression straps and mesh storage pockets
  
• Securely store a water bottle and other small items in the zippered
  side pocket
  
• Designed to be used as a carry-on when the add-on daypack is
  removed and carried as a personal item

Specifications
Warranty: Limited Lifetime
Weight: 4.05 lb
Brand: Thule Luggage
Line: Landmark
Model: 3205312
Luggage Size: Backpack
Wheels: Non-wheeled
Material: 420D Dobby polyester, bluesign approved
Dimensions: 21.5 x 17.7 x 13 in

A simple addition that makes a noticeable difference.