The Bottomless Pouch is a bauble for the belt slot added by Thaumic Tinkerer. It can carry up to 117 stacks of items and has the functionalities of the Focus Pouch.
Note: This infusion has an instability level of "Very High".
By infusing a Focus Pouch with items such as the Portable Hole focus, you managed to allow it to not only store more than Foci, but also to have a very extensive storage space.
This pouch can not only carry more than four chests, but it also doubles as a standard Focus Pouch, allowing any foci within it to be inserted in a wand like normally. You can kiss your inventory problems goodbye.