I love drinking from my sippy cup. However, I put coffee in my sippy cup once and it left a really strong coffee odor. It took me many, many tries to finally get rid of the smell.
So, until I buy a separate sippy cup just for coffee, I'll be drinking coffee from a mug for the time being.
By the way, I think your bottle is really cute! I'm thinking of buying a similar one, I saw it on Amazon from NUK.