18-9 cm? Actually we need to ensure I use the exact 17 x 7.9 cm size from the original. The user wrote 17 x 7,9 cm. In English we should render as 17 x 7.9 cm. Here is the optimized English description: - 17 x 7.9 cm cooling blocks that fit neatly into portable containers and travel bags, providing long-lasting cooling for drinks or perishables during beach trips, garden cookouts, and car rides in warm conditions. - Made with leak-proof materials and strong internal gel insulation. These reusable packs resist punctures and spills while delivering even freezing for water bottles, fruit boxes, lunch containers, or food containers during summer adventures. - Slim design maximizes storage efficiency and minimizes clutter in ice chests, camping coolers, picnic baskets, or insulated bags, without crowding space for drinks, snacks, or party essentials. - Helps reduce melt in refrigerator drawers or outdoor cooling stations. These versatile packs offer cooling support at events, workplaces, school activities, or grill stations without the need for electricity. Use scenarios: - On the beach, at picnics, camping trips, or road journeys to keep beverages cold and perishables fresh. - In home or office settings to chill drinks and keep lunch containers cold, improving organization. - At outdoor events or catering where power is unavailable, providing reliable cooling without electricity.