Our Synapse 25 backpack is shown loaded with our various optional organizational pouches.

Bottom exterior pocket: Snake Charmer (Wasabi)
Left and right exterior front pockets: Travel Stuff Sacks, Size 1 (Steel)
Top exterior pocket: Mini Padded Organizer Pouch (or any other Mini Organizer Pouch, Pocket Pouch, or Clear Organizer Wallet)
Exterior water bottle pocket: Travel Stuff Sack, Size 2 (Wasabi)
Main compartment: 2 Medium Tri-Star Packing Cubes (could alternately fit 4 Small Tri-Star Packing Cubes), 3D Mesh Organizer Cube (3D Dyneema or 3D Clear would work as well) in Olive tethered with a Key Strap in Wasabi.