HoneyXp

Bukkit/Spigot plugin that allows you to bottle and drink XP.

Usage
Make the following contraption using a lightning rod and a lapis block:

Now with honey bottles in your hand, right click the lightning rod. A small amount (minimum of 7 xp) will be transferred into the honey bottle:

You can keep right clicking the honey bottles on the rod. The XP per click will increase until the honey is fully saturated. In total a single honey bottle can contain up to 427 xp which comes down to about 17 levels when counting from 0 levels. For a better understanding of how many xp are within certain levels see the minecraft wiki.

Permissions
In order to bottle your XP you need the honeyxp.bottle permission.
In order to drink bottled XP you need the honeyxp.drink permission.
To do both you can give the honeyxp.* permission.
Players have all permissions on default.