sealed space between their inner and outer walls to provide insulation.
For some products, dishwasher exposure can damage seals, finishes, or other components. If water gets into a sealed insulating cavity, the item’s ability to maintain its temperature can be compromised.
However, some modern insulated products are specifically designed to be dishwasher-safe, so check the manufacturer’s instructions before deciding.
Your “keeps coffee hot for 6 hours” mug could eventually become just… a mug if its insulation is damaged.
