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Item # STS3A209M

Sea to Summit X-Mug

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Sea to Summit X-Mug

By Becky

Enwild Gear Specialist

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Durable and completely collapsible, the Sea to Summit X-Mug has a 16.2 fluid ounce capacity and weighs just 2.7 ounces.


Durable and completely collapsible, the Sea to Summit X-Mug has a 16.2 fluid ounce capacity and weighs just 2.7 ounces. The BPA-free, food-grade silicone sidewalls are stabilized by a rigid nylon ring around the upper rim of the mug. Measuring marks aid in mealtime preparation. In use, the mug measures 4.5” x 3.25” but it collapses down to just .8” high, enabling it to nest inside larger Sea to Summit X-Series pots and dinnerware.

The Sea to Summit X-Mug is available in your choice of color options.

  • Folds flat for compact packing
  • Food grade flexible silicone sides
  • Nylon ring at the top maintains shape & prevents scalded finger tips
  • 2 cup capacity (16 oz / 480 ml)
  • Nests into the flat X Bowl & X Plate
  • Dishwasher and microwave safe

Technical Specs

Best Use
Backpacking, Camping
Item Weight
2.7 oz
Item Dimensions
4.5" base diameter x 3.25" high
Limited Lifetime
Collapsible mug
16.2 fl oz
Packed Size
4.5" diameter x 0.8" high

3 Reviews

4.67 / 5


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John K.


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.



Little Bear


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

Ron W.




Doesn't take up much space. The graduation marks are nice to have.