Iran's washing up liquid protest

A striking piece of graffiti in the heart of Iran's capital Tehran has been widely shared on social media. It shows a woman holding up a "World Cup" in the shape of a washing up liquid bottle. What does it mean and why has it struck a chord?
 Black Hand is sometimes referred to as "Iran's Banksy". It's unclear whether it's a man, a woman, or a group of artists behind the work, but the graffiti keeps springing up around the Iranian capital.
 And one Saturday morning at the end of June, Tehranis woke up to the image of a woman in the national team kit, holding aloft in her soapy gloved hands a bottle of washing up liquid. The image has been captured and shared thousands of times on Facebook, Twitter and Instagram - not only because of its prominent positioning on the main street in Tehran, Vali Asr, but also because it clearly
struck a nerve.