Bucket Storage Blocks
UPDATE 1.10.2 : This still exists but no longer as a standalone single item mod. See downloads at https://mods.curse.com/mc-mods/minecraft/239286-cyclic , a mod where you can turn off any items you dont want in config.
Ever wanted to transport dozens and dozens of lava buckets, but had no inventory space? Now you can put them all into a single block.
This block has no inventory, instead you hit (attack/left click) the block with a bucket in your hand, and the Empty Storage block will transform into a storage block for that bucket type (does not work currently with mod liquid).
The block can store any number of buckets. When you mine the block, in your inventory under the name there is a number telling you how many are inside.
Also its contents are readable by a comparator.
Requires Minecraft Forge version 1.8-18.104.22.1686 or higher.