Dishwasher Safe Symbols Explained

What Do Dishwasher Safe Symbols Mean?

The symbols on the bottom of your dishes, cups, and containers tell you whether they can go in the dishwasher — but they are not always obvious. Here is a complete guide to reading dishwasher safe symbols and what each one means.

The Standard Dishwasher Safe Symbol

The most common dishwasher safe symbol is a square box containing one of the following:

• A dish or glass with water droplets above it: The item is dishwasher safe
• A dish or glass with water lines or rays: Dishwasher safe
• The words “Dishwasher Safe”: Self-explanatory — the item can go in the dishwasher

These symbols indicate the item has been tested and confirmed safe for dishwasher use under normal conditions.

Top Rack Only Symbol

Some items are dishwasher safe but only on the top rack, away from the heating element. The top rack only symbol typically shows:

• A dish or glass with water droplets, with an arrow or line indicating the top position
• The words “Top Rack Only” or “Top Shelf Only”

This symbol is common on plastic items, which can warp on the bottom rack due to heat from the heating element. Always follow this instruction — placing a top-rack-only item on the bottom rack can permanently damage it.

Hand Wash Only Symbol

Items that should not go in the dishwasher are marked with:

• A hand under running water
• The words “Hand Wash Only”
• A crossed-out dishwasher symbol

Never put hand-wash-only items in the dishwasher. The symbol is there because the material, coating, or construction will be damaged by dishwasher heat, detergent, or water pressure.

Plastic Recycling Codes and Dishwasher Safety

Plastic items without a clear dishwasher safe symbol can be assessed by their recycling code — the number inside the triangle on the bottom:

• Code 2 (HDPE): Generally dishwasher safe
• Code 4 (LDPE): Generally dishwasher safe
• Code 5 (PP — Polypropylene): Generally dishwasher safe — the most common food-safe plastic
• Code 1 (PET): Not recommended — can warp and leach chemicals at high temperatures
• Code 3 (PVC): Not dishwasher safe
• Code 6 (PS — Polystyrene): Not dishwasher safe — melts at dishwasher temperatures
• Code 7 (Other): Varies — check the manufacturer label

What If There Is No Symbol?

If an item has no dishwasher safe symbol, the safest approach is to hand wash it. This is especially important for:

• Older items made before dishwasher safe labeling was standardized
• Items with painted, printed, or metallic decoration
• Items made from materials known to be dishwasher-sensitive (wood, copper, crystal, cast iron)

What Dishwasher Safe Does Not Mean

A dishwasher safe label means an item will not be immediately destroyed in the dishwasher — it does not guarantee the item will last indefinitely with repeated dishwasher use. Many items labeled dishwasher safe will degrade faster than hand-washed equivalents, particularly non-stick coatings, printed decorations, and plastic items.

Use the Right Detergent for All Your Dishwasher Safe Items

Even dishwasher safe items benefit from a quality detergent that cleans effectively without being unnecessarily harsh. Cascade Platinum Dishwasher Pods are a reliable everyday choice, while BLUELAND Dishwasher Detergent Tablets offer a gentler natural formula for those who prefer it.

Quick Reference: Dishwasher Safe Symbols

• Dish with water droplets → Dishwasher safe
• Dish with water droplets + top rack indicator → Top rack only
• Hand under water → Hand wash only
• Crossed-out dishwasher → Not dishwasher safe
• No symbol → Hand wash to be safe