Rating: 4 / 5
I love this little mug, if they included a lid I'd easily give a 5. As is, it's very sturdy (yet light at 2.8 oz) and well made. Plenty of volume for a solo hiker. It has ample room inside to store my esbit stove, 4 days of fuel, windscreen, mini bic and small ti spork.
I added a custom lid from four dog stoves which now makes the mug perfect- SP should seriously consider lids for all their small/medium mugs.