Do not use the product at medium elevations or where there are large changes in air pressure on an airplane.Do not use if the product is scratched or cracked before use.Check for leaks before use.Do not fill with paint thinner, alcohol or nail polish remover.Do not fill with boiling water.Do not leave filled for extended periods of time.Use and keep out of reach of infants.Do not use or store in a place subject to direct sunlight, high temperature or high humidity.Immediately discontinue use if the product becomes deformed or damaged.Keep away from fire and other sources of heat.Do not use this product for purposes other than its intended purposes.