Cork Glass Cup Dishwasher Safety: What to Know
By KeepCup® | Reusable Cups, Bottles & Bowls — Made for ... | Published: 2026-10-20
Category: Tips & Care
Wondering if your KeepCup Brew Cork Glass Cup is dishwasher safe? Get the facts on cleaning, care, and how to keep your cork cup in top shape.
Quick Answer
No, you should not put a cork glass cup like the KeepCup Brew Cork Glass Cup in the dishwasher. The heat and moisture can damage the natural cork band, causing it to swell, crack, or lose its grip over time.
Why Dishwashers Harm Cork
Cork is a natural material that expands and contracts with temperature and moisture changes. In a dishwasher, the high heat and prolonged wet environment cause cork to swell and then shrink unevenly as it dries. This can loosen the cork band on your glass cup or create cracks.
The strong detergent and water pressure can also strip the cork's natural oils, leaving it dry and brittle. Over time, this makes the band less effective as an insulator and grip aid.
Cork Cup Care FAQ
- Can I put my cork glass cup in the dishwasher?
- No. Dishwasher heat and moisture will damage the cork band. Always hand wash your cork glass cup.
- How should I hand wash my cork glass cup?
- Use warm water, mild dish soap, and a soft sponge or cloth. Gently clean the glass and cork band, then rinse thoroughly. Avoid soaking the cup or using abrasive scrubbers. Use a soft cloth to avoid scratching the glass or damaging the cork.
- How do I dry my cork glass cup after washing?
- Dry immediately with a clean towel. Let the cup air dry completely upside down on a dish rack before storing. Do not place it in a drying cabinet or near direct heat. Store the cup in a dry place away from humidity to extend cork life.
- Can I use bleach or harsh chemicals on the cork?
- No. Harsh chemicals can dry out and discolor the cork. Stick to mild dish soap and water.
- How do I remove stains from the cork band?
- Mix a small amount of baking soda with water to form a paste. Gently rub onto the stain with a soft cloth, then rinse and dry. Avoid heavy scrubbing. Test on a small hidden area first to ensure the cork color doesn't fade.
Product Spotlight
- Brew Cork Glass Cup: The Brew Cork Glass Cup features a glass body with a cork insulating band for grip. The cork band is a natural, non-waterproof material that requires gentle care to maintain its function and appearance.
Brew Cork Glass Cup
