**8 things you should never put in the dishwasher** (and why)

Travel Mugs and Thermoses

Some insulated bottles and travel mugs are dishwasher safe, while others are not.

High temperatures can damage:

Plastic components
Rubber seals
Exterior finishes
Certain vacuum-insulated structures

A damaged seal can also cause leaks.

Better care

Follow the manufacturer’s instructions.

When hand washing is recommended, use warm soapy water and a bottle brush, then allow the bottle and lid to dry completely before reassembling them.

 

7. Copper Pots and Pans

Copper cookware can quickly lose its attractive finish in the dishwasher.

Strong detergents and high temperatures may