i highly recommend these water containers, they are so easy to handle, they hold around 20litres, and a lot easier to pour the water into your backpack as they have a long bottle neck, and great big handle at the side, i have 2 now, and another 6 coming at the weekend, the best i have ever used, pity you cant get them in 25ltr or can you, they would sell better than the ones we normaly use
