A couple answers to above questions about the Diva.
When out and about shopping, working, and having to use a public restroom. I will dump the cup, wipe it out with tissue paper, and pop it back in.
For the camping question, I would just get the water ready before hand, wash and re-insert. And I would bury the contents. I haven't taken mine camping where there wasn't clean water available, if there is, I wouldn't worry whether the water is even hot. But I'm a bit of hippie.

And am not a germ freak at all...
Here is how I care for my diva cup:
I wash it morning and night with soap, during my cycle. I use a cold-process handmade soap, not an anti-bacterial one; or Dr. Bronner's liquid soap. I suds it up, then clean the air holes around the top by filling it with water and placing my hand over the top, and squeezing it to shoot the soapy water out. Rinse well, and re-use. If I am at home when I empty it during the day, and on my heavier days, I do empty it a lot... I rinse it out with water in the sink. At the end of my cycle I wash it very well, and store until the next month. I wash it when I start to use it each month.
And for the person who commented about having it in your luggage? I think you were joking, but if not, you can actually wear it whether you are using it for its purpose, or just don't want a stranger asking questions.
The biggest plus for me, since changing to a Diva and cloth pads, I have gone from a nine to twelve day period, to an average of five to seven. And my cycle has gotten much easier to deal with.