Do not use if the product is scratched or cracked before use. / Use on a flat surface. / Do not leave water in the vase for a long period of time. Water scale, etc. may form and become difficult to remove. / Do not put in high places or at the end of desks or shelves. / Do not apply force and twist from the inside when cleaning. / Do not use or store in a place subject to direct sunlight. / Use and keep out of reach of children. / Do not use a scrub brush or polishing powder with this product. / Do not drop this product or hit it on other objects. / Stop using this product immediately if it becomes damaged. / Keep away from fire and other sources of heat.