A simple tiered backpack mod, for your item storage needs.

Current Features:

• 4 Tiers of Backpacks(Common: 18 Slots, Uncommon: 33 Slots, Rare: 66 Slots, Epic: 99 Slots)
• 5th Ultimate tier, 158 slots in 1.16.5+
• Curios support. (1.16+)
• Baubles support. (1.12.2)
• Openable via hotkey
• Hotkey toggleable item auto-pickup with whitelist/blacklist support.
• Upgradeable via crafting
• Can supply items to Better Builders wands and Building Gadgets when not in bauble slot.

Mod Integrations:

• Baubles: Equippable into and openable from a bauble slot. (1.12.2)
• Curios: Equippable into and openable from back slot (1.16+)
• Inventory Tweaks(1.12.2)

Requires:
Shadowfacts' Forgelin - Kotlin language adapter(1.12.2 Version only)