Which backpacks are obtained only through the creatures' loot?

Question

As the main question say, which backpacks are obtained only through the creatures' loot?

Answer 1

Here's a list of backpacks only dropped by creatures and not obtained by a NPC, quest, or reward:

Buggy Backpack dropped by Kollos

Book Backpack dropped by Faceless Bane

Ghost Backpack dropped by The Pale Worm

Festive Backpack dropped by Piñata Dragon

Winged Backpack dropped by Urmahlullu the Weakened

Old and Used Backpack dropped by a specific Orc

Pillow Backpack dropped by Lloyd

Feedbag dropped by

• Glooth Fairy
• Professor Maxxen

Deepling Backpack dropped by

• Deepling Guard
• Deepling Tyrant

Mushroom Backpack dropped by

• Diremaw
• Hideous Fungus
• Humongous Fungus
• Chasm Spawn

Jewelled Backpack dropped by

• Crystal Spider
• Dark Torturer
• Enlightened of the Cult
• Mr. Punish
• The Bloodweb

was also a replacement of old key rings.... so that was another way to obtain it when they made that change

Wolf Backpack dropped by

• Feroxa
• Shadowpelt
• Black Vixen
• Bloodback
• Sharpclaw
• Darkfang

Source: https://tibia.fandom.com/wiki/Containers