Our revolutionary Cold Plunge uses powerful cooling, filtration, and sanitation to give you cold, clean water whenever you want it, making it far superior to an ice bath or chest freezer. The Plunge is safe for indoor or outdoor use and we've made installation truly plug-and-plunge. Fill your Plunge up with a hose, turn it on, set your temp (down to 39F) and get ready to change your life!.