I do carry a small "kit" in my purse for when I'm triggered which could lead to SI, SU, dissociation etc.
I carry something for every sense. Gum & my favorite mints for taste. Only get to have them in emergency...makes them taste better. Crayons to smell...take me back to a happy memory etc, my absolute favorite worry stone. I love the way it feels. A list of mindfulness techniques I usually don't use & a few other things. I only open the bag in extreme emergencies so I've had it for 9 months so far & only used 2 things out of it. It keeps them special.

I also like some of the things on the list I might "borrow". Love watching a candle burn!