Paileology, the study of buckets.
This mods simply adds buckets made out of various materials such as: wood, leather, glass and gold. Wooden buckets can only pick up cold liquids such as water and glass buckets will break after placing a hot liquid such as lava.
The buckets added by this mod are able to pick up liquids from practically any mod so you might never even need iron buckets anymore.
It's also fully configurable which means that you can add and remove buckets to your heart's content.
Questions and answers:
Q: I don't get it
A: Pail is a synonym for bucket.
Q: Will you add clay buckets?
A: No, if you want clay buckets use the Ceramics mod. If you don't like the other things it adds you can just disable them.