Love saving money by getting convergence devices? How about a convergence mug? The Hot/Cold Mug will swing both ways, and for £14.99, it is the same as purchasing two different mugs. After all, whenever you pour a scalding hot drink inside, the Hot part will show itself, and vice versa whenever there is an ice cold drink within. Of course, fill it up to half with a nice hot dose of coffee and the mug will be half and half – at least it shows you up to what level of drink you have inside, and might just avoid scalding your lips accidentally.