Insulated coffee cups are durable, double-walled vessels, typically made from 18/8 stainless steel with a vacuum-sealed, airless space between layers to eliminate heat transfer Designed for commuting and daily use, they keep drinks hot for 3–17 hours or cold for up to 58 hours, often featuring leakproof, screw-on lids with BPA-free, food-grade silicone seals.
