Best Reusable Cups for Smoothies

Hey Guys,

I was just wondering if anyone can recommend a reusable cup for homemade smoothies (to bring to work) - leakproof etc.

My husband has a Frank Green for his coffee (plastic base) but i find it reeks in smell and the lid is annoying to wash.

Would love some new ideas how to bring my smoothies to work. Thanks guys~!