I've been camping for two-four weeks every summer for a total of some forty years. I have to carry my gear part of the way to my current favorite campsite. So, I've been upgrading my gear to make it more compact. I tried the X-Mug to replace some drinkware. It collapses to a thin disk, holds up well when expanded, and is solid in the hand when drinking. The stiff brim allows me to comfortably drink hot or cold liquids, and the silicone material allows for boiling water for tea et al. I bought a second one after trying the first. If you want to pack light and/or efficiently, I highly recommend it!

Fabulous and so convenient. Use it everywhere. It even fits in my car's beverage holder. Good grip because of the ridge up the sides. Comfortable to hold when full of hot coffee and there are no burned lips when you use this mug. I bought the highly visible lime green X-Mg so it wold never be overlooked when leaving a campsite.

I found the X-Series Mugs, Bowls, & Plates are really good for Base camp, Family/Car Camping or anywhere that space is a premium. They also clean easily and are very compact. Not sure yet, if I would use them for multi day backpacking due to being slightly heavier than a Ti Mug. The X-series does take heat well. I was eating oatmeal and soup from it daily for a month now. I gave it a 4 because of the weight, and It does seem to be picking up and retaining the smell and flavor of the soup. I have a different color for each of my kids so they don't fight over who's is who's.