Some products are exceedingly simple to comprehend. Such is the case with the âHot-T Wandâ by Minimal Inc. This portable gadget heats up the desired amount of water in your cup for a quick, on the go tea, anywhere, anytime. When youâre done, just pull it out and slip it into its perforated heat cover. As far as safety measures are concerned, it has a water sensor that goes about heating only when in contact with water.