I enjoy my latte served at optimum temperature of around 70°C, but the problem is after a few minutes it turns cold. Then, I came to know about Nanoheat Pad.
Nanoheat PAD, a glass-based warmer that can be used to heat up anything that is placed on top of it, including coffee cups, teapots, pastries, fondues, and even banana leaves wrapped Nasi Lemak! With a heating tempered glass surface that could heat up to 130°C, Nanoheat PAD’s usage is basically limitless!
I find this a great invention, its compact which is great to carry around if you intend on working at a cafe, the downside is you’ll require a plug point. Nevertheless, I’m using my Nanoheat pad in my office, that way my coffee is kept warm. You should use a glass cup instead of ceramic as it may not be that effective. If you are keen on trying out Nanoheat pad you may visit a selected cafes here and try it out yourself.