On my last trip to Tokyo, I brought along the Sea to Summit Ultra-Sil Day Pack ([amazon_link asins=’B00DI7GDY4′ template=’PriceLink’ store=’boingboing’ marketplace=’US’ link_id=’68119611-f5b7-4b46-9542-44b7f831beed’] on Amazon). It weighs 2.4 oz (my iPhone 6 Plus weighs 6.2 ounces) and zips up into a bundle smaller than my fist. But it holds 20 liters of stuff, and I used it every day to carry water, snacks, sweaters, an iPhone charger, a portable wifi, groceries, and things Carla and I bought while walking around. The material feels indestructible.
This travel daypack zips up into a tennis ball sized bundle
