This is a great addition to your BDSM aftercare kit. I love that all you have to do is bend the foil slightly, and it activates the heating pad. Boiling the water and having your heat pack on a rack inside of the water so it doesn’t touch the bottom of the pot is necessary so you don’t melt the pack, but once the pack doesn’t have crystals in it anymore, then it’s ready to reuse. I will definitely be keeping this in my aftercare kit to use after a scene where I don’t want to bring a whole heating pad or I just need the warmth. I think it would also be great to use it for any sore part of your body. I put mine in the strap of my top to hold it down, and it helps really nicely for my chronic pain.