"Once a week for up to 70 ° C dishwasher safe"
(I have always set the mode 50 ° C) after the first wash in the dishwasher then the shock: The bottles have moved down so that they could no longer stand up straight! Both bottles had the neck area below the shutter significant cracks.
Thanks to Amazon I got immediately refunded the full purchase price. It is a great pity that the bottles do not even withstand 50 ° C. Either I have received here a bottle from a faulty production, or they really are not dishwasher safe.
Left open the question of what would have happened if I had given the bottle more often than once a week in the dishwasher ...
I would not buy it again.