Oyster knife - Blue - With Protection | Pratik | NOGENT. The Blue Polypro oyster knife is an essential tool for simplifying oyster tastings. Its ergonomic handle, designed for a perfect grip, allows you to open oysters safely. The stainless steel blade ensures unparalleled durability, and the blue handle design evokes the ocean. Ergonomic handle in overmolded polypropylene. Guaranteed unbreakable. Dishwasher safe: Yes. Lifetime warranty! Labeled EPV, Living Heritage Company since 2013. Materials: Stainless Steel, 2 mm thickness.