As of version 1.0.0, requires library mod Athenaeum.
This mod introduces five tiered, configurable water cans. By default, the diamond tier watercan is set to have an infinite capacity. The gold watercan will grow crops at the slowest speed, but spawn flowers on grass at a high rate. Each watercan can be configured via the config file.
You can use this mod in any modpack provided you do not host the file elsewhere.