Wash with dish detergent before first usage.Do not use a scrub brush or polishing powder with this product.This product is not fully airtight.Do not wash with dishwashers or dish dryers.Do not use in microwave.Do not use in freezer.Do not fill with boiling water.Do not use with carbonated beverages or dry ice.Do not leave on its side.Do not use or store in a place subject to direct sunlight, high temperature or high humidity.Do not drop this product or hit it on other objects.Immediately discontinue use if the product becomes deformed or damaged.Keep away from fire and other sources of heat.