Nov 6, 2022adminBento Box, electric lunch box recipes, food safety storage conditions, induction heating cooker recipes, school lunch box ideas, thermos recipes, USB Food Warmer, USB lunch box, USB Portable Food Warmer, 保溫飯壺 We were pleased to show our usb food warmer at the Gerontech and Innovation Expo cum Summit (GIES) on 2-5 Nov in Hong Kong Convention and Exhibition Centre and received good comments from the public.