MyBottle Purifier is the only EPA registered bottle purification system available. Simply fill the bottle with water, insert the purification system and drink from virtually any water source. It removes all viruses, bacteria, cysts from water plus the integral carbon cartridge reduces chemicals and makes water taste better. As always, each MyBottle includes a drinking straw to use as your everyday bottle if the source water is already safe to drink.Cartridge Capacity: upt to 26 gallons (100 liters), depending on water qualityHeight: 26.5 cm / 10 inchesTechnology: 3 Stage Virustat purification technology, including granular activated carbon