ID:305X160X205MM OD:390X215X270MM carton size:895x400x550 pakage:7pcs/carton They are good mate for outdoor picnic,trave,campling, storage medicine,fishing Usage:cooling:put the cooler & warmer in refrigerator horizontally for 10 hours ,and then put it into attemperator.The cooler & warmer should be put above the food ,fruit and drinks,and then covered tightly.Under the normal circumstances,temperature would keep under 15 degrees for 20 hours. warming:put the cooler & warmer in the short wave ,heating for 120 seconds until temperature reaching +60°C- +70°C ,and then put it into attemperator