The Lisbon-based design studio Krv Kurva has made this reusable bag. Shaped like a teardrop and with a whole bunch of different nice graphics. The bag is constructed from Dupont’s material called Tyvek (water, radioactive, and bio-hazard resistant). Thinner than one millimeter and weighing less than 40 grams, this bag is able to hold up to 55kg easily, while still being machine washable.