BottledExp
Plugin available in all worlds
Summary
Gives users more information about their current XP status, and allows them to create XP bottles from already earned XP.
How to Use
/bottle get [amount] - create [amount] xp bottles from your current XP.
/bottle get max - create the maximum number of xp bottles possible from your current XP.
/bottle stats - get information about your current amount of XP and how many XP to next level.
/bottle until [level] - how many XP bottles needed to get to level [level].