during repeated washing. Items may also chip or break if they knock against other dishes.
Better option: Handwash delicate or valuable glassware unless the manufacturer specifically confirms it is dishwasher-safe.
7. Insulated Travel Mugs and Thermoses
Your reusable coffee mug may look perfectly suitable for the dishwasher, but some insulated containers have seals, vacuum insulation, or exterior finishes that can be damaged by heat and detergents.
Water may also enter parts of the lid or insulation assembly if the product is not designed for machine washing.
Better option: Check the
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