No self-respecting Brit would be caught in the wild without a Handkerchief or a bottle of gin.
I'm breaking the mold, and leaving the gin at home, but can't live without my hanky.
It's functional, and field-washable. Like most Americans Theresa was utterly disgusted at first, but now is a true convert and carries two in her pack also.
I buy my Handkerchiefs in England – import your own.