Since version 1.3 you can fill empty bottles on mature plants! Using shears on a full grow plant gives exp in range from 3 to 19, 11 on average as usual, filled bottle instead will give exp in range from 3 to 13, 8 on average. But you can bring them with you and use when needed...
As a mini-boss, the Experience Demon appears as a walking experience bottle. It wields massive tomes, which it uses to shield itself from harm. At the start of the fight, the tomes will absorb any physical attacks (depending on the difficulty, in peaceful you need to use arrows), making...