My new routine for coffee

I love this mixer mug!
I had a little trouble at the beginning with the metallic taste that gave the coffee but good rinsing the cup a few times it dissipates quickly.
The mixer function works very well - as I usually lengthened to serve me coffee with condensed milk - this is an indispensable function to homogenize the coffee (much better than mixing with a spoon) and make it tasty at will.
Only problem, the delivery which has put a lot of time.