Quality feel, super screw, the Blender Ball works great and absolutely tight. Only the closure of the drinking spout could be slightly revised. The snaps at my bottle often "two-stage" one, ie it cracks again and then you have to press again fixed again is a clicking noise. If you do not, the kitchen looks surprisingly milky ...;) When you open it then become a bit too stiff, but better than protein shake in the sports bag.
