Fashion brand Balenciaga created a $2300 handbag in the style of an Ikea plastic bag. Ikea responded. Text at bottom spells out how to identify the original IKEA FRAGA bag, e.g. ‘are you able to fold it to the size of a small purse?’, and does it cost 99 cents?

Ikea ad showing 'original' Balenciaga bag - the Ikea 99 cent version

Great response. Mucho social media. Win for both brands.