Small - 18cm / 7.08 inch (450 ML / 1.90 US Cups) Large - 23 cm / 9.05 inch (1.0 Litres/ 4.23 US Cups) The germ-busting HERO Bowl is an antimicrobial dog food and water bowl, and is guaranteed to resist the growth of over 99% of MRSA and E.Coli?ábacteria, as well as microbes including bacteria, mould and fungi. Made with built-in smart silver ion technology, the HERO Bowl gives unparalleled 24-hour antimicrobial protection and is the most hygienic dog bowl on the market. Superior alternative to stainless steel, glass and ceramic bowls. Guaranteed antimicrobial performance for 25 years even if scratched or chewed. Reduces risk of cross contamination. Dishwasher and microwave safe. Stain and odour resistant. Made from Recyclable polypropylene