The RapidPure® Purifier+ Multi-Use System is a 4-way multifunctional system that uses our innovative POD platform for water filtration and purification YOUR way. The POD platform adapts to your adventure, using UltraCeram® and OpenPore technology for protection against viruses, bacteria, parasites, and more. Four Ways to Use: BOTTLE: Connect to your own 28mm bottle, or use the included soft bottle STRAW: Drink directly through the POD with the included emergency straw GRAVITY: Create your own lightweight gravity system by hanging upside down INLINE: Connect to your hydration pack and filter water as you drink