Safe Material: Two 5-liter and two 10-liter foldable buckets are made of environmentally friendly and safe polyethylene (PE), which is non-toxic, BPA-free, and odorless. You have nothing to worry about regarding your health. Easy to Carry: The water tank is very light, flexible, and foldable, saving space and making it easy to carry. This portable, foldable water tank holds up to 5 or 10 liters of water. You can take it with you on your outdoor activities or travels. Leak-proof and Stable: Despite its flexibility, the water tank is completely leak-proof and stable. When filled with water, the container stands upright without problems. Robust and Durable: We have reinforced the thickness of the foldable water tank for increased durability, better pressure resistance, and greater stability. It is easy to fill with drinking water, beverages, or ice cubes, and refilling and cleaning are simple.