The container should not be overfilled. Leave about 2 cm (0.8") below the edge because the lid or stopper also needs some space. The seal of the lid or stopper should be clean and dry. This will prevent the contents from leaking.

No, only if stated otherwise on the packaging. The mug VA-9581Q, food containers VA-9683, VA-9684 and vacuum pots VA-9330K, VA-9331K, VA-9332K, VA-9333K, VA-9334K, VA-9344K, VA-9345K, VA-9346K are suitable for dishwashers. Especially double-walled containers with plastic parts (handle, grip) can be damaged by water inlet in the dishwasher. This also applies to plastic closures and non-slip rubber bases and to containers with color coated surface.