Index Advance is the next generation of Joseph Joseph"s multi-award winning chopping board categorization system, designed to reduce the likelihood of cross-contamination of different food types. Its four color-coded chopping boards now boast convenient, non-slip feet on both sides and index-style tabs with contrasting, soft-grip illustrations, ensuring the boards are even easier to select for each food type. In addition, the surface of the storage case now sports a subtle, embossed grid texture and a darker silver hue, making the whole unit even more stylish and desirable. With Index Advance preparing vegetables, fish, raw meat and cooked food, is now even safer. Chopping boards are dishwasher safe. Wipe case clean with damp cloth. Silver.