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Sea to Summit X-mug
Good size mug. Expands both directions for different shape and sturdiness. Great for car cup holder when needing a handy spot for food/ snacks. Measurement markings on inside of mug, 100-480 ml.
Good hot drink option for the companion of the cook system carrier. No need to carry the bulk or weight of a hardsided tea/coffe mug.
Does great with hot liquids and very packable. I use it primarily for sharing tea and coffee with my wife off of our shared cook system. I find it reasonably priced as well.
Not the most stable of mugs. Really the only reason I see this as a 4 star, not a 5 star product
Doesn't take up much space. The graduation marks are nice to have.