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It can be difficult to carry a bottle of gf soy sauce around, but
I tried using a refillable perfume bottle, the kind we women
can carry in our purses to refresh our scent of the day.

It works very well! It's small enough to carry in a purse or
pocket, and sprays a nice amount of the sauce on your
steamed veggies and plain rice to make them quite tasty.
The amount is rather small; I had to stir my food around and
spray a couple of times, but on the other hand, no puddles.
It's also quite unobtrusive--only my family noticed me using
it. Other diners and the waitstaff ignored it, and it could sit
out on the table without  comment. Also, when I returned it
to my purse, I didn't have to worry that someone would
suspect me of pinching the restaurant's sauce! And since
it is designed to be tucked into a purse, it is not likely to
leak, break, or have the cap fall off. I keep one with me
all the time now, so I'm always ready to eat Asian food.

They can be attractive and inexpensive. Men could use a
plain design (mine has enameled flowers). Cosmetic counters
at department stores and some drug stores often sell them.

Good luck and good health!
Bobbi in Baltimore