You did not ask for her or went looking for her, but she is just as permanent in your life as that birthmark on your right cheek or that scar on your forehead. Even though she bosses you around and has a couple of annoying friends, she is your pillar of strength. If your sister is the best f*cking sister ever, then our ‘Best Sister Ever’ funny mug is the gift you need.

On her birthday, your sister deserves to know that you may pretend to hate her 364 days of the year but the truth is that no sister can ever be as good as her. So, gift your sister our ‘Best Sister Ever’ funny mug and make her birthday extra special.