Efficient cleaning power The high-density gold carborundum infused sponge delivers effective scrubbing thanks to wear-resistant aluminum oxide and strong toughness, helping you clean cups and other smooth surfaces quickly. Durable construction A resilient carborundum inner core paired with a robust sponge provides long life and reliable cleaning performance. The design emphasizes wear-resistance and durability. Time-saving design Nano Carborundum sponge technology makes the inside and outside of cups look brand new with a few simple circular motions, reducing cleaning time and physical effort. Efficient stain removal Advanced physical friction enables all-round cleaning for quick removal of stubborn stains, improving cleaning effectiveness and efficiency. Key attributes Materials: carborundum inner core, gold carborundum infusion, wear-resistant aluminum oxide Function: scrubbing, stain removal, surface cleaning Compatibility: suitable for cups, mugs, glassware and other smooth kitchen surfaces Performance: durable, efficient, capable of quick stain extraction Use scenarios - Everyday cleaning of cups and mugs after coffee or tea - Cleaning travel mugs, teapots, and water bottles with stubborn stains - Quick refresh of glassware and other smooth kitchen surfaces used for beverages