I am so happy Sea to Summit made a cup smaller than the x-mug. I use the mug as a bowl, but it's a bit large for my small hands. I also wanted something smaller, just to use as a cup for brushing my teeth when I travel. When I heard this was coming, I couldn't wait. I love the compactness. I do a lot of backpacking and packing with my horses, so the smaller and more compact the better. I'd love it with a cover for keeping things hot, but I guess that will come in time.