What is it with kids and hiding things?

Thankfully, this is a juice sippy, but it's worse when the milk sippy goes missing. (Might I add that I detest sippy cups with a passion!) Little Man is addicted to hiding things...my shoes, my keys, my wallet, my phone, my sunglasses, his cup, his sister's cup, and the list goes on...

I swear it's to keep me on my toes.