Blueberries are hard to shop for since you don't know how they will taste when you eat them. They may be too tart, or too sour...
Here's a hack to know when it's best to eat them!
Get a bowl of water, pour all the blueberries in them. How do you know which is the perfect berry?
THE FULLY RIPE AND SWEETER BERRIES WILL SINK TO THE BOTTOM
The less ripe and more tart berries will float.
Photo: Getty