Sea to Summit X-Mug

3 reviews
5-star:   1
4-star:   2
3-star:   0
2-star:   0
1-star:   0



I love this cup. It is light (2.4 ounces) but not…

Rating: rated 4.5 of 5 stars
Price Paid: $10

I love this cup. It is light (2.4 ounces) but not completely lightweight compared to ordinary plastic cups. The advantage is the collapsibility.

I enjoy coffee and tea (hot) at most anytime. When it comes to the outdoors, both are essential liquids to me. I enjoy a nice hot cup of joe and tea to start the day and to ease into the evening at the campsite or waypoint.

The X-Mug allows me to collapse the mug from 4.25 by 2.75 inches down to a very small size ( about 1/2 an inch), is made of food-grade silicone, and fills me up with 16 ounces of hot joe. 

It will easily clean, leaves no after taste (you need to wash thoroughly before the first use), and dries quickly. The silicone can withstand high liquid temperatures and is very flexible (except the plastic stability ring at the top).

Mine (blue in color) is nestled at the bottom of my Quart capacity aluminum anodized cookset (it fits perfectly inside).

You can't go wrong with this one.


Don't pack the kitchen sink, a couple of these collapsible…

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: $12


Don't pack the kitchen sink, a couple of these collapsible mugs and your all set!


  • Internal gradient markings help you measure out the contents
  • Packs small when collapsed
  • Bright colors, hard to misplace


  • Would be nice if they had a clip attachment

These are great, I use then for coffee and eating meals. It's really the only thing I need to bring when backpacking for eating or drinking at camp.

They double as a measuring cup which comes in handy for measuring water for dehydrated meals.


I got two for Christmas last year. Great mug for backpacking.

Rating: rated 4.5 of 5 stars
Price Paid: $11.95

I got two for Christmas last year. Great mug for backpacking. It holds a generous 16 oz. of liquid, and it collapses flat for easy storage. Fits perfect in the bottom of my titanium cookset with the fuel canister.

I use mine mainly for coffee or Tang. With hot liquids the sides can get hot, so hold it along the top plastic ring. I use to use Lexan mugs, and although they were lightweight they were more cumbersome to pack. The X-Mug is so much more compact.

Manufacturer's Description

Visit Sea to Summit's X-Mug page.

Retailers' Descriptions

Here's what other sites are saying:

The Sea to Summit X-Mug is constructed from a flexible, European standard compliant, food grade silicone. A rigid ring within the rim keeps it sturdy to hold onto and easy to drink out of but still allows the mug to be collapsed to a disk that will fit in the palm of your hand! The X Mug fits neatly into the X Bowl and X Plate and altogether the collapsed set is less than an inch thick.


Enjoy your favorite campsite beverages while saving room in your pack with the collapsible Sea To Summit X-Mug.


The Sea To Summit X Mug is an innovative collapsible camping mug that won't take up any space in your pack. Packs down flat with the unique collapsible design. Weighs only 2.1 oz so there's no reason not to bring it along. Expands to hold 2 cups, so it's got plenty of volume. Lines calibrated to be used as a measuring cup, perfect for backcountry cooking. Nests in the Sea To Summit X Bowl. Food safe silicone material can take hot liquids up to 180 degrees. A rigid ring at the top makes it easy to hold onto. Dishwasher safe and microwave safe. One of the most clever camping mugs we've seen, from Sea To Summit. Volume: 16 fl oz (2 cups) (480 ml). Weight: 2.7 oz (78 g). Dimensions: 4.5 x 3.25 in (11x8.5 cm). Available colors: Blue, Lime, Black, Orange, Grey, Red, Pacific Blue, Royal Blue, Lime Green, Berry

- Tahoe Mountain Sports

Sea to Summit X-Mug FEATURES of the Sea to Summit X-Mug Unbreakable, folds flat for compact packing Food grade flexible silicone Calibrated as a measuring cup Nylon ring at the top maintains shape and prevents scalded finger tips Nests into the flat X Bowl and X Plate Dishwasher and microwave safe SPECIFICATIONS of the Sea to Summit X-Mug Dimension: (D x H): 4.5 x 3.25in. / 11 x 8.5 cm Weight: 2.7 oz / 78 g Volume: 16.2 fl oz / 480 ml This product can only be shipped within the United States. Please don't hate us.

- Moosejaw