Careful With Metal Mugs and such and inspect them in the store if its capable. My Local Gander mountain sells tiny SS sierra cups for like...I believe around 8$? I forget the price off my head but it was super expensive for what it was. The Cups small and the Rolled edge is as sharp and jagged as a tin can that's been opened with a brick. Not something I wanna be putting to my lips.
I have owned and used many cups of this type and I have never seen one with a jagged edge. Cabela's must have gotten a bad lot. They tuck away nicely in a pack, but even the small ones are a bit clunky for a pocket, although it depends on whether you are talking about a pant's cargo pocket or something on the upper body.