Mekong River Rice Paper 3 Colours - Banh Trang Ba Mau (22cm) 300g. Mekong River Rice Paper is a traditional rice paper which is an indispensable ingredient in Vietnamese culinary culture. Mekong rice paper is produced and packaged, maintaining the standards of safety and cleanliness for consumers. No Preservatives, No Additives. 100 - Percent natural colour from rice grains.