FYI, it's so so easy to just stick a few packets of ranch dressing mix in your suitcase when you visit - so much easier than grappling with bottles or trying to find another brand that may not suit. I don't make it much, but when i want it, I want it - I find a box of mix packets lasts me pretty much all year. I also like the option of making it with skim milk and low fat mayo....
Also, if you can get a trade membership (a friend of mine used to give us one on his as he had his own business) you can buy multi packs of pain relievers. I still prefer Excedrin so I import the giant bottles, but if I still had a Costco trade membership I'd learn to live with Anadin Extra.