Free gift idea?

So, my shop has been known to include a free gift with every purchase, and generally, it's complementary earrings or something of the sort... but I honestly need a way to get my product out there, and somehow, the grand idea of having buttons made for me seemed very likely to happen.

Not sure which design to choose, but I want something bold. Please help me choose! :]

the flower or...

the lightning bolt?

By the way, I'm horrible at designing stuff like this...