Barrel-like item storage

[Demiu]

TL;DR

Alternative UPS-efficient single item type storage for chests and trains

What?

I am sure the developers are familiar with minecraft mods like JABBA that add barrel/drawer type storage, with way fewer item slots, but the slots can store more items, above the regular stack size. It would be nice to have something like that available, even if just in mod API. Memory Storage achieves something similar but with scripting and it's one of the most downloaded mods tagged storage on the mod portal.

Why?

A lot of mods add bigger chests and trains that can be a UPS hit due to the amount of slots. A form of storage like this is the most efficient (insertion/deletion can just be reduced to simple addition/subtraction of a number) for the most common use case of single item prototype contents

[OneOfTheChips]

Wouldn't this functionality be easily achieved with a recipe to say convert 100 iron plates into "bulk iron", which can be reverted back to 100 plates in a machine as needed?

If its a mod you're after, Packing Items seems to fit the bill. Freight Forwarding is a modpack that has that functionality but I'm not sure if it can be obtained standalone.