I've been using my Jetboil cup to drink coffee from when backpacking because it's simple, but the second half or so of my coffee is always cold. No bueno. I either need to reheat it, wasting more fuel, or just deal with it. I have a Hydro Flask brand double wall cup that sat in my cupboard for damn near 2 years...just never thought to use it. I started using at home one day on a whim and I won't even use a regular coffee mug at home anymore. I think I'm going to take the weight penalty and add it to my backpacking kit as well. It keeps coffee at a perfect sipping temp for 30-60 minutes. I assume the cups on this drop are similar. (Also will be nice to have a whiskey sipping cup instead of drinking from a flask...FANCY)