Ninja Sip Perfect 16oz. Travel Mug, Leak Proof Stainless Steel Insulated Tumbler for Hot Drinks, Ash Gray

This item not only lives up to it's description but it holds items around there desired temperature for long periods of time. The cup doesn't leak and fits comfortably in needs spaces. I have small hands and it is still easy for me to hold and transport.

In full disclosure, I received a voucher from the company to try this product. That being said, I am thoroughly enjoying it thus far. The design is nice, it is a solid, heavy container (though that does make it difficult at times to tell if its empty). I believe it is primarily designed for hot beverages and it keeps them at just-right temperature for long periods of time. It does keep drinks cold as well though ice seems to melt faster than many regular tumblers that are primarily designed for that, but again, its primarily for hot beverages. Fits great in the cup holder and very easy to drink one handed.