The Strawberry Sunglasses are a pair of face items in Club Penguin. They could be unlocked from a code available in the 'Innocent Smoothies for kids' drink, exclusive to the UK.
This item was released in the 2012 Innocent Smoothie Advertising Campaign in the UK.
There is a bug where if you put this item on your penguin with the Cherry T-Shirt, you would have both items placed higher than they are supposed to be, while sitting.