Omie | OmieBox - Hot/Cold LunchBoxOmieBox Hot and Cold Bento Lunchbox OmieBox is an innovative bento box for keeping both hot and cold food in the same lunchbox now even better! Bigger thermos, keeps food warmer, longer and is easier to open and close! A vacuum insulated bowl keeps food warm for up to 6 hours. Food is also kept cool through the double walled, insulated tray. Air insulation, vacuum insulation plus an airtight seal minimises heat transfer to keep food fresh and yummy.