Big capacity and not leaking

I love Sistema, the products never disappoint me.
I bought three mugs while it was still cold and that bringing soup at work, or have cool in the fridge for the evening was very comforting.
The mugs are very good ability, and they absolutely do not flee (even upside down!). The heating is not very homogeneous and we must stir several times.
Level quality / price ratio is perfect.