Use safe and harmless silicone material, heat resistant up Low temperature -40, high temperature +230. Suitable for microwave oven, oven, dishwasher cabinet, steamer. Can boil disinfection. BEST COLANDER SET for YOUR KITCHEN: Works for draining most foods like spaghetti, pasta, potatoes, broccoli, green beans, carrots, spinach and other veggies. User these strainers to rinse your salad leafs, fruits and fresh vegetables. Convenient : Collapses to only 2 inches in height making it a breeze to store anywhere. Just press in the middle to expand. Recommended Uses : Spaghetti, Pasta, Potatoes, Broccoli, Green beans, Carrots, Spinach, Salad leafs, Fresh fruits, and more. Great for camping, great for traveling. Safety: Dishwasher safe for easy cleaning. FDA approved and BPA-free, so you can use it without any worries.