We've all been in situations where our usual beauty routine had to be compromised. Whether it was because we decided to spend the nights with our significant other, crashed at a friend's place, went camping, just moved in to a new place, or got all our stuff confiscated at airport security there are days where our set of shampoo/conditioner/lotions weren't available.
What to do in these setups? It's simple--carry a small 3oz container of Dr. B's castille soap. Not only can you use it as shampoo and body wash, it also doubles up as a fruit/vegetable wash and (possibly, though not explicitly stated) dish fluid. Now that's some serious multi-tasking. All organic with scents of peppermint, eucalyptus, almond, rose, citrus, lavender, and tea tree! I seriously survived on this stuff for a week while traveling round Venice/Milan/Bologna/Cinque Terre.
[Dr. Bronner's Castille Soap. $2.49]
If you're super cheap you can even buy the Trader Joe's peppermint version (I do!)