The adoption of the heat preservation food case is mold ed only once and the raw material is plastic which is innocuous and tasteless and all import ed from the f oreign country . T he pigment is food class material which accords with the standard of the national health department . In the last few years, the national health department is very the one who value, special each size of rightness supply in the infant park lunch, can not reach the index sign because of the dining room hygiene, food appears the problem, request to be go together with by the qualified for fast food company to send all now, the food heat preservation box that my company produce now, temperature can keep in 60-70 degrees of Celsius, food can guarantee the certain temperature, dining and can eat safe trust, the food that temperature again guarantee.