I have two of those clear plastic brush tubes from Em's Place and I have found that the wooden handled boar brush from Omega fits perfectly in one, as does a Vulfix #404. Another tube to hold an Arko shave stick, and I'm set.
I'll probably be carrying a tube of Tom's of Maine "Refreshing Mint" shave cream, too, just for variety.
Wifey and I are going to be going to visit her relatives in the Philippines later this year and the last time I visited, I sat at the dining table to shave, with various nieces and nephews watching the goings-on. Boiling water in a kettle on the stove and using a plastic dishpan to shave in is the order of the day. Yes, we get spoiled by our plumbing here in North America.