If you always wanted two things at once...here's your best option.
Great lock feature, I usually hold between the locking features in order to carry it. If you wanted to clip it on it's side you could (I would do it when the cup is empty). As far as warmth I never put anything in the cup warm only my smoothies and water on the other side. Great feature to also put fruits on the side and a liquid option.
Rating: 5 stars