Stanley cups, widely popular online, have recently made headlines on social media for a different reason: concerns over potential lead content. While the company denies this claim, users are sharing and discussing this issue online.
Is the Stanley Cup in the lead?
The Stanley cups, along with other items, contain a small amount of lead in the base.
The Stanley cup manufacturer states that the thermal cup’s vacuum insulation contains lead, but it is enclosed by stainless steel to prevent users from being in direct contact with it.
Pacific Market International, the company in charge of producing Stanley cups, made a statement.
Our production process currently uses standard industry pellets to seal vacuum insulation at the bottom of our items; the sealing substance contains lead.
Once closed off, this space is shielded by a tough stainless steel coating, preventing access by customers.
Ensure that there is no lead present on the surface of any Stanley product that comes into contact with consumers, as well as in the product content.
The hazards associated with lead
Many social media users are worried about these rumors because lead is a harmful metal that can lead to poisoning and result in the following symptoms:
- Elevated blood pressure
- Joint and muscle aches
- Memory and concentration issues
- Headache
- Abdominal discomfort
- Mental health conditions affecting emotions
- Difficulties with reproduction
Lead poisoning can result in the following symptoms in children:
- Developmental delays and challenges with learning
- The process of supplying water to plants for growth.
- Weight loss and decreased appetite
- Fatigue and decreased overall energy
- Gastrointestinal issues like abdominal discomfort, nausea, and bowel irregularity
- Loss of hearing
- Seizures
- Consume items that are not considered food (a condition called pica).
The popularity of Stanley Cups has increased.
Stanley cups have become popular globally, including in Brazil, available in different colors and designed to keep beverages chilled for an extended period. The widespread use of thermal cups necessitates caution regarding the cup’s materials, as highlighted by Jane Houlihan, research director at Healthy Babies, Bright Futures.
Consumers are unlikely to be exposed to lead if the glass stays unbroken. However, if the seal at the bottom is taken off, it will increase the risk.
“Lead is extremely dangerous, and there is no room for error when dealing with it,” she mentioned in an email to CNN Brasil. “If a company relies on the assumption that its product will always be completely safe, there is a fundamental issue with material safety that is being passed on to its customers.”
If the cup separates from the base and reveals the seal, it is eligible for a replacement under the lifetime warranty, as stated by Stanley.

What is the acceptable amount of lead?
According to the US Consumer Product Safety Commission, there is no amount of lead that is considered safe for children.
Lead can build up in the body over time, causing continuous exposure and potential toxicity even at low levels.
Children and infants are at the highest risk from metal exposure, with even small amounts of lead being extremely harmful, according to the U.S. Environmental Protection Agency.
Specialists suggest parents should have their children’s lead levels tested at ages 1 and 2, with additional tests potentially needed based on the area. This assessment can be done by a pediatrician or local health center.