This genuine porcelain mug uses heat sensitive inks that react to the temperature of your morning coffee. Just fill it up and watch the gauge magically show you how much coffee you have left in your tank. Genius.
If you are lazy like me, you should take it to restaurants with you too. That way you can visually show the waitress that you need a refill without ever having to ask. Yes, I am that lazy.
It appears that even ‘Grapes’ enjoys his cup of joe in the morning.
Grapes, looks like you need a top up. And some hockey.