Unsafe containers.

Emotions make up our feelings and every feeling has its own way of getting out. You feel, people around you feel the same. One’s expression may tell you of their emotions and feelings. 

Which emotion is the hardest to contain??

Well, the hardest one to contain is joy. If I feel low I keep it to myself, you have to always maintain your composure right? But, happiness out of a joy is too conspicuous. So, with me, the unsafe ones are well contained and the rest released out in the universe after all, all that you send into the universe is what you get back.