I received the Ion Mug with Charging Coaster free to test out.  I was very excited to receive this since hot tea going cold is a big issue for me.  This product is a game changer for me. No longer do I have to deal with cold tea or cocoa.  My tea stayed hot enough to have constant steam coming from my tea.  I love that if I get busy or distracted  that my tea will be just as toasty hot as it was when I started.  I will say that I am drinking more tea purely because of this mug.  I love it!