The Short Answer
It depends entirely on when it was made.
If your Tupperware is from before 2010: Stop using it for food.
Tupperware officially removed BPA from its products in March 2010. Before that, many of their rigid, clear containers were made with polycarbonate, which leaches Bisphenol A (BPA). Worse, independent XRF testing has detected unsafe levels of lead, arsenic, and cadmium in the coloring agents of vintage yellow, orange, and red bowls.
If your Tupperware is new (post-2010): It is safer, but not perfect.
Modern Tupperware is free of BPA and phthalates. However, it is still plastic. We rate it as "Caution" because recent research shows that even "safe" plastics like polypropylene release millions of microplastic particles when heated. Use it for cold storage only—never the microwave.
Why This Matters
The BPA & Hormone Disruptor Link
BPA is a potent endocrine disruptor that mimics estrogen in the body. It’s linked to fertility issues, developmental problems in children, and metabolic disorders. While Tupperware phased it out in 2010, millions of vintage containers are still in circulation. If you are eating out of a container made in 1995, you are likely ingesting BPA with your leftovers.
Heavy Metals in "Retro" Kitchenware
That sunny yellow vintage bowl? The color likely comes from lead chromate or cadmium.
Independent testing by lead-safety advocates found:
- Lead (Pb): Up to 2,000+ ppm in some vintage yellow measuring cups.
- Arsenic (As): Found in vintage yellow and green items.
- Mercury (Hg): Detected in certain orange vintage pieces.
These metals are neurotoxins. They don't just stay in the plastic; they can leach out, especially when the plastic is scratched, worn, or heated—which describes almost all vintage Tupperware.
The "Microwave Safe" Trap
A "microwave safe" label does not mean chemical safe. It simply means the plastic has a high melting point and won't warp in the microwave.
- Fact: A 2023 study found that microwaving polypropylene (the "safe" #5 plastic) released 4.2 million microplastic particles per square centimeter into the food.
- Verdict: Is It Safe To Microwave Food In Plastic|Never Microwave Food In Plastic, regardless of the brand.
What's Actually In Tupperware
Tupperware uses different plastics depending on the product line and era.
- Polycarbonate (PC, #7) — AVOID.
Found in older, rigid, clear containers (like the old "Rock 'N Serve"). Made with BPA. If it's rigid, clear, and vintage, toss it.
- Polypropylene (PP, #5) — CAUTION.
The cloudy, flexible plastic used in most modern bases. BPA-free, but degrades with heat and high-acid foods (like tomato sauce). Safe for cold storage, risky for heat. What Plastic Containers Are Safe For Food
- Low-Density Polyethylene (LDPE, #4) — ACCEPTABLE.
Used for the flexible lids. Generally considered one of the safer plastics with low leaching potential, but strictly for cold use.
- Tritan (Copolyester, New #7) — DEPENDS.
Used in the newer, glass-like clear containers. It is BPA-free and BPS-free. While marketed as safe, some researchers argue we don't yet have enough long-term data on the proprietary additives used to make it shatterproof.
What to Look For
Green Flags (Keep for Cold Storage):
- Manufactured after 2010.
- Recycling Codes #2, #4, or #5. These are generally safer standard plastics.
- "BPA-Free" Label. (Though this doesn't guarantee it's free of all estrogenic chemicals, just BPA).
Red Flags (Retire Immediately):
- Vintage Colors. Specifically solid yellow, orange, and red opaque items from the 1970s–90s. High risk of lead/cadmium.
- Recycling Code #7 (Vintage). If it's old and marked #7, it's likely polycarbonate (BPA).
- Damage. Scratched, cloudy, sticky, or pitted plastic harbors bacteria and releases more chemicals.
- Stains/Smells. If it smells like 1998's spaghetti sauce, the plastic matrix has degraded and is absorbing (and likely releasing) chemicals.
The Best Options
If you need to replace your collection, skip the direct-sales plastic and go for inert materials.
| Brand | Material | Verdict | Why |
|---|---|---|---|
| Pyrex / Anchor | Glass | ✅ | Best for everything. Heat safe, dishwasher safe, zero leaching. |
| Stasher | Silicone | ✅ | Great for freezing and snacks. Lighter than glass. Are Silicone Storage Bags Safe |
| Stainless Steel | Steel (304) | ✅ | Unbreakable and lightweight. Perfect for lunchboxes (cold food). Are Stainless Steel Containers Safe |
| Modern Tupperware | PP / Tritan | ⚠️ | Cold storage only. Do not heat. Hand wash recommended. |
| Vintage Tupperware | Unknown | 🚫 | Avoid. High risk of BPA and heavy metals. |
The Bottom Line
1. Purge the Pre-2010s. If you can't verify it was bought after 2010, demote it to organizing crayons or garage nails. Do not eat out of it.
2. Ban the Microwave. Even your brand new Tupperware should not enter the microwave. Transfer food to a ceramic bowl or plate first.
3. Hand Wash Plastic. The high heat and harsh detergents of the dishwasher break down the plastic surface, increasing microplastic shedding.
FAQ
How can I tell how old my Tupperware is?
Tupperware includes a date code dial on the bottom of many products—a small circle with numbers. The number in the center often indicates the year (e.g., "08" for 2008). If you see a two-digit number lower than 10, assume it's pre-2010 and potentially unsafe.
Does the "Microwave Safe" squiggly line mean it's non-toxic?
No. It only means the container won't melt or warp. The FDA allows small amounts of plastic migration into food. Crunchy standards are stricter: zero plastic migration is the goal, which plastic cannot achieve under heat.
I have a lot of vintage Tupperware. Is it safe to keep?
It is safe to keep as collectibles or for non-food storage (like sewing kits or hardware). However, keepsakes like the yellow measuring cups should be kept away from children due to potential lead content on the surface.
Is Tupperware going out of business?
Tupperware filed for Chapter 11 bankruptcy in September 2024. While they are restructuring and still selling products, this financial instability makes lifetime warranties difficult to enforce. It’s another reason to switch to more accessible brands like Pyrex.