Waterdrop Water Filter Camping, Personal Water Filter Straw with Gravity Water Bag, 0.01 Micron Water Filtration System Drinking Water Purifier for Survival Equipment, Emergency Hiking: There are 3 parts in the package of this item: a filter straw, a white small bag and a blue gravity bag. Please note that the white bag is in one package with the filter straw, while the blue bag is in an individual package. Premium materials: Effectively Reduces 99% of harmful substances. The adoption of high grade coconut shell activated carbon fiber improves odor and taste, ensures the water safety and delivers better drinking experience.