Hand washing is recommended to maintain optimal condition. We recommend this way because there is no harm to your Tumbler. Hand-washing always ensures the most efficiency and cleanliness for tumblers, because you are the one who washes, so you will know where the cup is dirty or if there is a place on the body that needs to be washed thoroughly.
Our care instructions will always be attached to each tumbler posted, so just do not do what we list in the picture and you will keep a perfect cup.
As we have recommended above, only hand-wash. In addition, you should not:
Rinse tumbler out with dishwasher
Do not put it in the microwave
Do not soak
Do not scrub vigorously, leading to scratches on the glass
Do not drop tumbler because it will scratch and turn into a mess sure that you don't like at all
Do not put a tumbler in a place with extreme temperatures
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