Quick answer

Yes, you can safely put hot coffee in a KeepCup cork glass cup. The glass body and cork band are designed for hot beverages, and the cork provides a comfortable, insulated grip. Just avoid sudden temperature changes to prevent thermal shock.

How hot can the cup get?

KeepCup does not publish a specific maximum temperature for its cork glass cups. In practice, the cups handle typical coffee temperatures (around 160–185°F / 70–85°C) without issue. The cork sleeve stays cool to the touch, making it comfortable to hold even with a hot drink. For safety, avoid preheating the cup in a microwave or pouring boiling water directly into a cold glass.

Does the cork sleeve affect heat retention?

The cork band provides light insulation, so your coffee will cool slightly faster than in a double-wall steel cup. This is actually a benefit for many drinkers who prefer to sip without waiting. If you need maximum heat retention for a long commute, consider a vacuum-insulated stainless steel cup instead.

FAQ: Hot Coffee in Cork Glass Cups

Is the cup microwave-safe?

KeepCup does not recommend microwaving cork glass cups. The metal lid components and cork band are not microwave-safe. Heat your beverage separately, then pour it in. Avoid the microwave to preserve the cork and lid.

Can I put it in the dishwasher?

Hand washing is recommended for cork glass cups. The cork band can degrade in high heat and moisture over time. Wash by hand with mild soap and air dry. Hand wash to extend the life of the cork.

Will the glass break from hot liquid?

The glass is designed for normal hot beverage use. Avoid thermal shock by not pouring boiling liquid into a cold cup, and never place a hot cup on a cold surface. Use common sense to prevent breakage.

Does the lid fit securely?

Yes, the press-fit lid creates a spill-resistant seal. For hot drinks, ensure the lid is fully clicked on before carrying. The lid is not leak-proof, so avoid tipping it upside down. Check the lid seal before moving.

Product facts