Most food storage containers can go in the dishwasher, but only if the maker says so, and each material wants slightly different treatment. Glass is the easy one, plastic is the picky one, and the lids and seals are where most damage happens. If you have ever pulled out a warped lid that no longer closes, you already know why the question “can food storage containers go in the dishwasher” deserves a real answer, not a shrug. This guide gives you a clear rule for every material, a loading routine I use at home, and a short list of things that should always be washed by hand.
Check the bottom of each piece for a dishwasher symbol or “top rack” wording. Glass bases can go on either rack. Plastic, lids, and seals belong on the top rack, away from the heating element. Skip the sanitize and heated-dry settings for plastic, and let it air-dry. Wash wood or bamboo lids, anything marked hand wash only, and anything warped or unlabeled by hand.
Read the Label First
The label on the bottom of a container tells you more than any rule of thumb, because makers test their own products. Look for three kinds of markings.
- The dishwasher symbol. It looks like plates or glasses with water spraying over them. If it is there, the piece is meant for the dishwasher.
- “Top rack only” wording. Many plastic pieces carry this, and it means exactly what it says.
- “Hand wash only.” Believe it, even if the container looks sturdy.
One symbol confuses a lot of people: the cup and fork. It means the material is considered suitable for contact with food, not that it is dishwasher-safe. A piece can have the cup and fork and still need hand washing.
Also check the lid separately. A base and its lid are often made from different materials, so they can carry different instructions.
Material by Material
Each material handles the dishwasher differently. Here is how I treat the ones you are most likely to own.
| Material | Dishwasher? | Where to load it | Watch out for |
|---|---|---|---|
| Glass | Yes, in most cases | Top or bottom rack | A sudden jump from freezing cold to a hot wash |
| Plastic (including most lids) | Often, if labeled | Top rack only | Warping and clouding from heat |
| Stainless steel | Usually yes | Top or bottom rack | Water spots, and plastic lids that need the top rack |
| Silicone | Usually yes | Top rack, secured | A slightly oily film that can linger |
| Ceramic or stoneware | Usually, if not decorated | Top or bottom rack | Chips, and hand-painted or metallic trim |
| Wood or bamboo lids | No | Hand wash | Swelling, cracking, and splitting |
Glass. Glass handles dishwasher heat well, so the real risks are thermal shock and the lid. Do not take a dish straight from the freezer into a hot cycle, and give it a few minutes at room temperature first. The glass bases in our guide to the glass food containers are meant for exactly this routine, and their plastic lids go on the top rack.
Plastic. Polypropylene is the most common plastic for reusable containers and lids, and it tolerates more heat than most plastics, which is why so many makers rate it for the top rack. Cheap or thin plastic does not always hold up. If the piece is unlabeled, treat it as hand wash.
Stainless steel. The steel itself is fine in the dishwasher. The trouble is usually the lid, which may be plastic or silicone and needs the top rack. Dry the pieces promptly to avoid water spots.
Silicone. Silicone containers and lids are generally dishwasher-safe, but they can come out feeling slightly oily after a wash, because the material holds onto residue. If that happens, a quick hand wash with dish soap clears it. Our guide to plastic vs silicone storage explains more about how silicone behaves.
Why Plastic Is the Tricky One
Plastic is the material where the advice differs most, and it helps to understand why. Heat is the main reason. In many dishwashers, the heating element sits near the bottom, so the lower rack gets the strongest heat and spray. Heated-dry and sanitize cycles raise the temperature further. Thin or older plastic can warp, cloud, or lose its seal under that kind of heat.
You may notice that experts and makers do not agree. The Academy of Nutrition and Dietetics advises avoiding the dishwasher for plastic food containers in its guide to using plastic food storage containers, while many makers rate their polypropylene containers for the top rack. Both positions make sense. One is a cautious general rule, and the other is a tested claim for a specific product.
Here is how I handle it. I follow the label, load labeled plastic on the top rack, and skip the heated-dry setting. For old, thin, or unlabeled plastic, I wash by hand, which takes a minute and removes the question. If you want to take the cautious view for all your plastic, that is a fair choice too. For the safety side of plastic and heat, our guide to plastic food containers are safe covers what research does and does not show.
How to Load Containers Without Damaging Them
A few habits protect your containers and get them clean. They take no extra time once you make them routine.
1. Scrape and rinse first
- Action: Scrape off solid food and give each piece a quick rinse before loading.
- Reason: Dried-on sauce and oil are hard for a dishwasher to remove, and they can leave film behind.
- Result: The pieces come out cleaner, and plastic stains less.
2. Put plastic and lids on the top rack
- Action: Load plastic bases, lids, and silicone pieces on the top rack, and glass or steel bases wherever they fit.
- Reason: The top rack sits farthest from the heating element, so it gets the gentlest heat.
- Result: Lids keep their shape and keep sealing.
3. Angle lids and keep them from nesting
- Action: Set lids on their sides or face-down so water can reach the inside and drain, and do not stack pieces inside each other.
- Reason: Nested pieces block the spray, and water that pools in a groove leaves residue and a damp smell.
- Result: Each piece gets clean and dries fully.
4. Secure small parts
- Action: Remove any detachable seal or gasket and place it in a small basket on the top rack, or wash it by hand. Tuck loose pieces so they cannot flip.
- Reason: Light parts blow around and can end up on the heating element.
- Result: Nothing melts or goes missing.
5. Leave space and do not overload
- Action: Leave a little room around each piece.
- Reason: Water has to reach every surface to clean it.
- Result: You avoid cloudy spots and the need to re-run the load.
Which Cycle to Use
A normal wash is the right choice for almost all containers. The settings that cause trouble are the hottest ones.
- Normal or auto: the safest everyday choice for glass, steel, silicone, and labeled plastic.
- Sanitize: it raises the final rinse temperature, which is more heat than most plastic needs. Check your dishwasher’s manual, and skip it for plastic.
- Heated dry: this is a common cause of warped lids. Turn it off, or open the door after the cycle and let steam escape, then air-dry plastic pieces.
- Eco: it uses less heat, which is easier on plastic, though it may leave residue on greasy containers.
One glass note: after many washes, glass can turn cloudy, especially with hard water or too much detergent. A rinse aid and a normal amount of detergent help prevent it.
What to Wash by Hand
Some containers should skip the dishwasher entirely, and a quick hand wash is better than repairing the damage. Keep these out of the machine:
- Wood and bamboo lids. They swell and crack in the heat and the moisture.
- Anything marked hand wash only, including some ceramic-coated glass sets.
- Decorated, printed, or metallic-trimmed pieces, where the finish can fade or peel.
- Old, thin, warped, or unlabeled plastic.
- Containers with a stubborn stain or smell. Heat tends to set pigment, so treat them first. Our guide to removing stains and smells from plastic containers walks through the fixes.
Hand washing is simple. Use warm, soapy water, a soft sponge, and a brush for corners and grooves, then dry or air-dry fully.
When the Dishwasher Has Damaged a Container
A container tells you when the dishwasher has been too hard on it, and knowing the signs saves you from using a piece that no longer works.
| What you see | What it likely means | What to do |
|---|---|---|
| A lid that is warped or no longer closes | Heat has bent the plastic | Stop using it in the dishwasher, and replace the lid if it will not seal |
| White or hazy film on plastic | Mineral deposits, or the plastic clouding from heat | Try a vinegar soak, and if it persists, retire the piece |
| Cloudy glass | Hard-water film, or etching from detergent | A vinegar soak can clear film, but etching is permanent |
| A sticky or oily feel on silicone | Residue the dishwasher left behind | Hand wash with dish soap |
| Cracks or chips | The material is weakening | Retire it |
Our glass vs plastic guide lists the other signs that a container has reached the end of its life.
Conclusion
The dishwasher is safe for most food storage containers, as long as you follow the label, put plastic and lids on the top rack, and skip the hottest settings. Glass, steel, and silicone are forgiving. Plastic and seals need more care, and wood and bamboo should never go in.
When you are unsure, wash by hand. It takes less time than you would think, and it protects the pieces that are most expensive to replace.
Frequently Asked Questions
Do I need to rinse containers before loading them?
Yes, a quick rinse helps. Scrape off solid food, then rinse sticky or oily residue so the dishwasher can do its job. You do not need to scrub, but food that dries on is harder to remove and can leave film.
Does the sanitize cycle make containers safer?
Not meaningfully for home use. Normal washing with detergent removes food residue, which is what matters. Sanitize raises the final rinse temperature, which can warp plastic, so skip it for plastic pieces unless your container’s label says it is safe.
Why do plastic containers stay wet after a cycle?
Plastic does not hold heat the way glass and steel do, so water beads up and does not evaporate. Open the door after the cycle, let the steam out, and let the pieces air-dry, or towel-dry them if you are in a hurry.
Do dishwasher-safe containers last as long as hand-washed ones?
Usually they last a long time, but repeated heat does wear plastic down, especially thin sets. Glass and steel are less affected, while plastic lids and seals tend to age first. If a piece starts to warp or cloud, switch to hand washing or replace it.
Hi, I’m Muhammad Din. I test and compare kitchen tools in my own kitchen before I ever recommend them — if it’s in a guide on HomePlora, I’ve used it or dug deep enough to know exactly where it holds up and where it doesn’t. My goal is simple: help you find tools that actually earn a spot in your kitchen, without wasting money on ones that don’t.