Premium Material - Made from high quality stainless steel. They are eco-friendly, BPA free and non-toxin, which can keep your food fresh for a long period. Note: please DONT use it microwave or dishwasher. Leak & Spill Proof - The snap-on lids provide an airtight, leakproof seal to preserve freshness and prevent food from leaking and spilling. Perfect Size: 220ml, Perfect size for salad dressing, sauce, ketchup, peanut butter, snacks, leftover dips, a great addition to your daily meals. Non-Slip Exterior The exterior is made of non-slip material which will not only prevent the slipping, but also provide a perfect way to isolate the heat from the hot food so your hand wont get burned. The Joy of Healthy Meal This set is ideal for portion control which can help you keep reasonable portion to keep a healthy food habit. package:3pcs (pink+green+blue).