Containers With Paper Labels
Along with your deli containers, you may also save glass food jars for storage. There's no problem with placing the jars in the dishwasher, IF you remove the paper labels first. If you don't, the paper and adhesive may come off and clog the dishwasher drain and food disposal system.
Extra tip: One of the best label/adhesive removers on the market is Un-Du with a built-in scraper.
Comment: Never heard of the Un-Du but sounds like something that might be worth checking into. I have washed containers before but have had enough brain to soak the paper part in hot water to remove the label before going into the dishwasher.
Thin Plastic Containers
If you save every butter tub and deli container to use for storage, be prepared to loose a few if you place them in the dishwasher. The high heat can cause them to melt or warp.
When you place them in the dishwasher, use the top rack only and skip the high heat drying cycle. Remove from the dishwasher to air dry.
Comment: Learned my lesson the hard way with this one. A lid got hot, crinkled up and ended up on the heating element of the dishwasher. Never again.
Printed or Hand Painted Glassware
The techniques for commercial printing on glassware have improved but they are not always infallible in the dishwasher. That harsh detergent and the force of the water spray can remove the paint in just one or two washes.
And what good is a glass measuring cup with no lines?
Comment: I have noticed over the years that the markings eventually came off my measuring cup.
Insulated Glasses, Tumblers and Thermal Containers
Plastic and metal insulated cups, tumblers and containers are great for keeping hot things hot and cold things cold. Most are constructed with two layers of material with an airspace between the two. It's that airspace that provides the insulation.
While some containers are labeled as dishwasher safe, many are not. It is best to hand wash both plastic and metal insulated containers. If you decide to place one in the dishwasher, opt for the top rack and skip the high heat of the drying cycle.
Comments: I'm waiting on the list of what I CAN put in my dishwasher!
Acrylic or Melamine Dishes
Lightweight, non-breakable acrylic or melamine dishware is very popular due to the bright colors and patterns. Unfortunately, the high water and drying temperatures and harsh dishwasher detergents can ruin the dishes. After several washings, especially for cheaper sets, there can be hairline cracks and loss of color and design.
If you love them and want them to last, hand wash.
Comment: I've wasted a few of these dishes in the past. Guess I now know why.