Super Hostile Tokens
Some popular mods like Infernal Mobs and Spawner Control allow you to configure dropped items, but face limitations when working with NBT metadata. This creates certain difficulties - for example, it's impossible to configure FTB Quests loot containers to drop from infernal mobs or spawners.
To solve this problem, a special set of tokens was created. These tokens serve as an intermediate link: they can drop from mobs and spawners, and then be exchanged for loot containers through the FTB Quests system.
The tokens are available in several variants: iron, copper, silver, gold, red, and blue. This mod was originally developed for the official Super Hostile modpack, but you can freely use it in your own builds.