stainless steel vacuum box 1)used to cook eggs porriage noodle 2)Non-toxic food grade silica gel to seal stainless steel vacuum lunch box the picnic box How to use :Put the rice into the water of above 95 degrees,tighten the lid ,3-4 hours later,the rice become porriage.the box can also store ice drink,to cook eggs and noodles.you can also treat it as a drinking cup. BPA free double-wall ...