jsmith wrote:

Personally, I carry the piddle packs that contain the stuff used in
disposable diapers. $4 for a pack of three in the camping department at
KMart.

Internet search of K-Mart and Wal-Mart turned up nothing, but here's
another source:

http://www.sportys.com/pilotshop/pag...Product_ID=299
Travel John (pack of three)
Absorbent pouch turns urine into gel instantly while destroying bacteria
and odor. Specially designed collar works for men, women and children;
spill guard prevents back flow during use. Convenient, sanitary and
compact, the Travel John is easy to use while sitting or standing. Will
not leak, even if punctured. Keep several in the plane, car or boat.
Holds 24 fl. oz.
Travel John (pack of three)
ID #: 6585A
Price: $5.95