Cactus Shaped Stainless Steel and Silicone Tea Infuser, Tea Leaf Strainer, Spice Herbal Infuser, and Teacup Accessory, the fine holes ensure fast and effective filtration, which can help to give off the fragrance of loose-leaf tea—made with Food grade material, up to 450 degrees Fahrenheit resistant. Dishwasher-safe and rust-resistant.