RECALL: Acid found in tumbler cups after dozens fall ill in Canada

More than 40 people have reported symptoms related to a free promotional tumbler cup found to contain acids, leading to a Canada-wide recall.

Health Canada has issued a recall for the 30-ounce stainless steel tumblers given away with 12 and 15 packs of NÜTRL seltzers.

Tests have shown the branded cups “may contain a chemical solution” with levels of sulfuric and phosphoric acids trapped between the inner walls of the tumbler, the health agency says.

The tumblers were given away to consumers as a promotional gift between April 29 and May 17, including at LCBO stores across Ontario. Health Canada says some 33,000 units were distributed during the promotion.

“This solution may release when the tumbler is filled with liquid, posing a potential risk of serious injury,” Health Canada said in the alert, adding that the chemical and the tumbler may interact causing “elevated levels of iron, chromium, and nickel.”

At least 43 consumers have reported symptoms including headache, nausea, cramping and abdominal pain, and diarrhea.

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Anyone experiencing symptoms is urged to seek medical attention, Health Canada says.

Possible health effects include burning of the lips, tongue, throat, and stomach, tissue damage, nausea, vomiting, stomach cramps and diarrhea. Skin contact could also cause blistering, burns, pain, and redness.

Health Canada says consumers should immediately stop using the recalled product and contact the company for more information.

Consumers can also contact Health Canada toll free by calling 1-866-846-1778 for more information.