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I am an independent advocate with a focus on childhood lead poisoning prevention. I test consumer goods for toxicants using XRF technology. This is just one of my posts with the test results for a vintage Tupperware item that ended up being positive for high levels of toxicants.
What year was the cup discussed in this post made?
I bought the cup in this post used (in 2019) at a local antique store for $2.00.
While I cannot tell what year it was made based on the markings on the bottom of the cup or other factors (see more photos below) it looks like it is possibly older than the one pictured in this 1982 catalog as the shape and color appear to be slightly different than the 6 ounce tumblers shown in this catalog example – specifically the cup I tested is more of a mustard yellow and the sides appear to be more sloped than the similar example in the 1982 catalog (continue reading below the image):
What were the exact test results for this cup?
- Lead (Pb): 876 +/- 13 ppm
- Cadmium (Cd): 331 +/- 7 ppm
- Arsenic (As):87 +/- 9 ppm
- Barium (Ba): 442 +/- 43 ppm
- Chromium (Cr): 282 +/- 27 ppm
- Zinc (Zn): 401 +/- 8 ppm
- Nickel (Ni): 14 +/- 4 ppm
- Iron (Fe): 45 +/- 9 ppm
- Vanadium (V): 319 +/- 79 ppm
- Titanium (Ti): 4,288 +/- 161 ppm
Metals not listed were not detected by the XRF instrument. Tests were done for a full 3 minutes (180 seconds). Results are replicable and science-based. All testing on this site is done with a freshly calibrated Niton XL3T XRF instrument in consumer goods mode, unless otherwise noted.
How much Lead & Cadmium is an unsafe amount?
For context: the amount of Lead considered unsafe in a newly manufactured item intended for use by children is anything 90 ppm or higher in the paint or coating and anything 100 ppm or higher in the substrate.
The amount of Cadmium that is considered toxic is either 40 ppm or 75 ppm depending on which standard you look at (for total Cadmium content in consumer goods.) Cadmium is a known carcinogen (it causes cancer). As a result, by current / modern manufacturing standards this item would not be considered safe for use by children if sold and marketed to children today.
What does the company (Tupperware) have to say about this?
As with many other companies who are trying to deflect blame for potential toxic exposure to their customers who purchased their products historically, Tupperware has stated (to some of my readers who have made inquiries) that they have always complied with or exceed all government regulatory standards for their products. This is all well and good, except for the fact that, unfortunately, when this was manufactured there were no limits on total content of heavy metals (as detectable by XRF technology) in kitchenware. While some of the yellow vintage Tupperware brand items have tested negative (non-detect) for Lead your average consumer (you) cannot tell by simply looking which items might have Lead, Arsenic, Mercury and Cadmium and which might be free of these heavy metals.
If I have suspect Tupperware items, what should I do with them?
As a result, I would recommend not using this item or any other vintage Tupperware items for any food use purposes. Here’s my post about disposing of items that test positive for high levels of toxic heavy metals.
What is “Vintage”?
For those who ask “What is vintage?” – generally (from the perspective of collectors of vintage things) “vintage” refers to items 20 years old or older.
It seems (based on the testing I have done to date) that the vintage Tupperware items that are testing positive for high levels of toxicants are primarily those from the 1980s (and possibly the 1970s), although I understand that by Tupperware’s own admission – any products made prior to 2010 may also have unsafe levels of BPA.
If you must use plastics in your kitchen (and Tupperware specifically) please consider only using post-2010 pieces – and for other brands please look for labeling that specifies “BPA Free”.
If you work with or for Tupperware (or if you are a regular customer), please consider approaching Tupperware and asking them to address this concern (for heavy metals found in their vintage pieces) in a public statement. They have not yet done this since I brought the concern to the attention of the public in March of 2019 (with this original post about the yellow measuring cups) and the only response I have received as a result of my inquires can be seen on this link.
Mother of Lead-poisoned children.
To learn more about my story, please watch this 2.5 minute video: link.