Wash with dish detergent before first usage. / Do not use a scrub brush or polishing powder with this product. / Do not wash with dishwashers or dish dryers. / Do not apply force and twist from the inside when cleaning. / Use a sponge with a handle. / Do not fill with boiling water. / Do not rapidly heat or cool. / Do not use with carbonated beverages or dry ice. / This product is not fully airtight. / Do not leave on its side. / Do not use or store in a place subject to direct sunlight. / Stop using this product immediately if it becomes damaged. / Keep away from fire and other sources of heat.