Heating coasters/ USB cup warmer

Brand new, never used (just once checked if it works) I bought it as a gift, but the lines drawn on the coasters aren't clear so I decided to sell them. please find the details here: http://api-shein.shein.com/h5/sharejump/appjump?link=Vz4H8shgHBd&localcountry=CA&url_from=GM7440872045534679040