Man, all this talk about having a chew..had to go throw one in.
DeltaMD-88, funny you brought up this question as I've wondered about it myself. I've often done it on flights, but as you mentioned, try to do it discreetly. As far as cups go, when on a flt I often use a Starbucks coffee cup. It's got a nice lid with the little hole on top perfect for the occassion.
True, once it's in your mouth, no one else can really smell it. But open the can and it's no secret! Skoal Berryblend is almost like having Skittles in your mouth. I was skeptical about it at first, but now it's all I chew, or mint if it's not available. Now they have Vanilla Blend. Kind of wondering what's going on at R&D over at Skoal. Tried it once and didn't really care for it.
Skyway1, how true...Cherry Skoal is pretty bad!