Best Glasses?

I hear that these are some of the best glasses. Picardie Bistro Glasses are the iconic glass of French cafés and bistros. They are made of tempered glass and so they are very difficult to break. They are also good for both hot and cold drinks; "the smallest ones are perfect for an espresso with a dollop of steamed milk; the medium sizes are just right for a cocktail or bedtime glass of water; and the largest size hold an entire can of soda water. They have a vintage charm but a practical durability."

But my question, living in a small loft in the city, do they stack???