[jonrick46]

There are times when I bring my own Johnney’s Seasoning Salt to put on my reastaurant steak. I can see someone having their own vinegar and oil flask in a pocket ready to use for a restaurant dinner.

[muawiyah]

You betcha ~ BTW, malt vinegar is made from barley malt and it's deadly to those with wheat gluten intolerance. Best bet on vinegar is to bring your own as well as your gluten free soy sauce.

I have Indian and Pak friends who ALWAYS bring their own spices on a foray into a pizza joint.