EZPack has a full illow (âbladderâ) water tanks from 10 liters (2.5 gallons) up to 24,000 liters (6,000 gallons). The EZPack water tank is built from 2 layers: the outside layer â very rigid PVC that can endure harsh terrains; the inside layer â an inner insert made of food-graded material approved for storing drinking water. The inner-insert is the most advanced water product for emergency use, and it is based on EZPack's proprietary design and concept. EZPack products comprehensive solution for water distribution â easy to store; quick to install; low cost. The WSDS does not require any maintenance and requires very small space when stored.