How to Remove Stains from Plastic Containers (Tomato, Curry, and More)

Plastic containers stain easily from tomato sauce, curry, beets, and other strongly colored foods. These orange and red stains seem permanent — but they're not. Here's how to remove them.

What You'll Need

• Baking soda
• Hydrogen peroxide (3%)
• White vinegar
• JohnBee Spray Bottles — for applying hydrogen peroxide evenly
• Amazon Basics Non-Scratch Sponges
• Dish soap and warm water

Method 1: Baking Soda Paste (Best First Step)

1. Wet the stained container.
2. Sprinkle baking soda generously over the stained areas.
3. Scrub with a damp non-scratch sponge for 2–3 minutes.
4. Let the baking soda sit on stubborn stains for 15–30 minutes before scrubbing.
5. Rinse thoroughly. Repeat if needed.

Method 2: Hydrogen Peroxide Soak (Most Effective for Orange/Red Stains)

1. Spray or pour 3% hydrogen peroxide into the stained container to cover the stained area.
2. Let sit for 30 minutes to 1 hour — or overnight for deep stains.
3. Scrub with a sponge, rinse thoroughly, and wash with dish soap.

Hydrogen peroxide is particularly effective on tomato sauce and curry stains — the oxidizing action breaks down the pigment molecules.

Method 3: Sun Bleaching (No Chemicals Needed)

1. Wash the container normally.
2. While still wet, place in direct sunlight for 2–4 hours.
3. UV light naturally bleaches out many food stains from plastic.

This works surprisingly well on tomato and curry stains and requires no products at all.

Method 4: White Vinegar Soak

1. Fill the container with undiluted white vinegar.
2. Let soak for 30–60 minutes.
3. Scrub and rinse. Works well on lighter staining.

How to Prevent Plastic Container Staining

• Rinse containers immediately after use — don't let tomato sauce or curry sit
• Use glass containers for strongly colored foods like tomato sauce and curry
• Spray the inside of plastic containers with cooking spray before adding tomato-based foods — creates a barrier that reduces staining
• Wash promptly rather than leaving in the sink

Frequently Asked Questions

Why do plastic containers stain orange from tomato sauce?

Tomato sauce contains lycopene — a fat-soluble pigment that bonds strongly to plastic. Because plastic is slightly porous and has an affinity for oils, the lycopene penetrates the surface and is difficult to remove with soap alone.

Will these stains affect food safety?

Stains are cosmetic only and don't affect food safety. However, if the plastic is heavily scratched or degraded, bacteria can hide in the grooves — consider replacing heavily damaged containers.

Can I use bleach to remove stains from plastic containers?

A very diluted bleach solution works but requires very thorough rinsing. Hydrogen peroxide is a safer and equally effective alternative for food containers.