Do not use if the product is scratched or cracked before use. / Do not put in high places or at the edges of desks or shelves. / Use on a flat surface. / Do not rapidly heat or cool. / Do not leave filled with water for extended periods of time. Scale or stubborn grime may adhere and be difficult to remove. / Do not drop this product or hit it on other objects. / Stop using this product immediately if it becomes damaged.