My wife likes her tea, but she's the kind of person who gets hyper-focused on something and then everything else is forgotten, including various mugs of tea abandoned to go stone cold, even after a reheat (or 3) in the microwave. This infuriates me, so I bought her a self-heating mug. Admittedly I didn't go for Glowstone to begin with, as I hadn't come across them yet. I started with a competitor, which appeared plain and minimalistic but was very gimmicky, and I needed an adaptor to plug it in to charge, an app and a Bluetooth connection. All this to get my absent-minded wife to stick to one cup, and finish it at some point in the day. It quickly lost charge and became a hassle, so I sought a better alternative, and that's when I found Glowstone. British plug, British design and founder, no app needed, no Bluetooth or other requirements, just a cup that heats a beverage to the right temperature until it's empty, and a charging stand that you can use overnight without worrying about overcharging. Just put it there and forget about it till the next cuppa. Perfect! She was also impressed by the incorporated design of the heating element. You don't see any electronic parts, it looks like pure bone china, even the bottom of it which charges magnetically I assume, so we don't worry about any elements of it deteriorating when washed in water. It's so simple to use that even the most tech-phobic person would appreciate it, and the classic design gives a luxury aspect to it that befits its quality and justifies the price.