One bag, three ways
Product design company Quarkus has recently released the Tupi - a line of foldable bags inpsired by furoshiki, the Japanese art of folding cloth. You can use the Tupi as a sack, sling or backpack, depending on what and how much you need to carry. They're made of eco-friendly twill that is dye-printed with Pinoy motifs, such as Manobo tattoo patterns, jeepneys and the Philippine eagle.
Php 2,400 at quarkus.net