Updated for 2017: DromLite bags have a very large capacity despite their extremely small pack size. Additionally, they are very lightweight, making them easy to take anywhere. Durable: made from robust film with HF-welded seams. BPA-free, food-safe inner coating for great-tasting water, even at freezing temperatures. Accessories such as shower and drinking system kits provide versatile usage options. The new flat 3-in-1 cap allows for easy filling, drinking, and pouring.