I love the size of the 20oz cup. It is slender enough to fit in my cup holder in the car and stroller. The straw lid is my favorite. It has a pretty tight seal around the straw, although will leak if held upside down. I would prefer a silicone straw vs the hard plastic, so I may use one with this cup. I dropped my cup and the lid broke but customer service replaced the lid immediately. I love the look of the black cup. I haven’t tried hot drinks, but it keeps my cold drinks cool