我想問咩叫紅白藍呀??

yes, it is traiditional plastic bag. in the past (~30-40 years ago)...most HK ppl will use this bag to bring a lot of stuff (clothes, food, electric appliance..etc) to china to their relatives...
Thus, 'red white blue' represent a logo of HK ppl.

一種有紅色、白色、藍色的尼龍袋
多用於帶大量物品回鄉
亦有人用於搬屋時裝運物品

係咪紅白藍膠袋ar?....即係以前d人番大陸用個d大袋......不過而家少左好多人用...但都仲有...而且顏色都多左-.-