I carry this in my purse just in case! I haven`t really had an "accident" on the go, but I love, love the idea of it. My mother carries one too and has had to use it, and from her accounts, it works great!!
Love these pens. Used they several years ago, and thought they were off the market. Glad that they are not. They work really well on shirts with white stripes. You can bleach the stripes without bleaching the rest of the shirt.