Pocket Sack-in-a-Sack

 is a item obtained from the Bits Shop. It triples a Sack's capacity when combined in an Anvil.

Obtaining
 can be obtained from the Bits Shop for.

Usage
 can be combined with any Sack in an to multiply the Sack's capacity by. Only one can be applied per Sack. Upgrading a Sack with a  also upgrades its Rarity by 1.