How to Test Your Stanley Cup for Lead: A Step-by-Step Guide

How to Test Your Stanley Cup for Lead: A Step-by-Step Guide

Lead Testing Guide for Stanley Cups

Table of Contents


In light of concerns regarding the presence of lead in consumer products especially the widely popular Stanley cups, it's essential to know how to test these items, such as Stanley cups, for lead. While Stanley assures the safety of their products, consumers may seek peace of mind through personal at home testing. This guide outlines a straightforward approach to testing your Stanley cup for lead.

See Also: Are Stanley Cups Lead Free: An In-Depth Analysis

Understanding Lead Testing Kits

Lead testing kits are available at most hardware stores or online - we purchased ours from Amazon. They can provide a quick indication of lead presence. These kits typically use either a swab or liquid drops that change color when in contact with lead. For testing a Stanley cup, opt for a swab kit designed for use on metal surfaces.

lead test kit

Recommended Lead Testing Kits:

Here's a helpful Youtube video on how to test your Stanley cup for lead:

See Also: Is Stanley Lead Safe: A Comprehensive Analysis

Step 1: Preparing for the Test

Before testing your Stanley cup for lead:

  1. Clean the Cup: Ensure the cup is clean of any liquid that could contaminate your test, and dry to avoid any further interference with the test results.
  2. Wear Gloves: To prevent contamination from your hand and to also keep your skin protected from the testing agent. We recommend using disposable gloves.
  3. Read Instructions: Carefully read the instructions that come in the box or posted on the container of your test kit as procedures may vary slightly between brands.

Step 2: Conducting the Test

  1. Activate the Swab or Test Liquid: Depending on your kit, this may involve dipping the swab into water, shaking, squeezing, or snapping the swab to release the testing chemicals.
  2. Apply to the Cup: Gently rub the swab or apply the test liquid to an area of the cup you wish to test. It is important that the swab be in contact with the surface you are testing for a minimum of 30 seconds to be effective. Focus on areas where the drink would make contact or where wear and tear are visible.
  3. Wait for the Indicated Time: Allow the test to process for the time specified in the kit instructions. This is usually a few seconds to a minute.
  4. Observe Color Change: A color change in the swab or liquid indicates the presence of lead. Refer to your kit's instructions for the specific color change to look for. Typically, a purple, violet or reddish color change indicated the presence of lead.

Step 3: Interpreting Results

  • Positive Result (Color Change): Indicates potential lead presence. It's recommended to stop using the cup immediately and contact the manufacturer for further advice.
  • Negative Result (No Color Change): Suggests no detectable lead at the tested spot. It is advisable to test multiple areas, especially if the cup is used frequently. Once you are confident with your test results, thoroughly clean the cup to make sure no residue from the testing chemicals and reactive agent is left on your cup.

Step 4: What to Do If You Detect Lead

If you detect lead in your Stanley cup:

  1. Cease Using the Cup: To avoid exposure, it is very important that you stop using the cup immediately.
  2. Contact Stanley: Reach out to Stanley's customer service. Provide them with the test results and inquire about their lead safety measures. They may offer a replacement or refund. 
  3. Report to Authorities: Consider reporting your findings to consumer safety organizations or local health departments to ensure public safety.


Testing your Stanley cup for lead is a straightforward process that can provide peace of mind about the safety of your drinking vessel. By following these steps and using a reliable lead test kit, you can quickly determine whether your cup poses any risk. If you are looking fro a tumbler that has tested negative for the presence of lead, check out the Splitflask dual-chamber hot and cold tumbler.

Remember, safety first—always prioritize your health and well-being by staying informed and proactive about potential hazards in consumer products.