[video=youtube;HWjqn3ZpqoM]https://www.youtube.com/watch?v=HWjqn3ZpqoM&t=26s[/video]
Good video. As an old infantry guy I have to say that one liter of water isn't very much for a 24 hour period. Especially if you are doing any type of physical activity during that time. I guess refilling the water bottle is a possibility if you find a clean source or can boil it or filter it. Water is heavy but it is also very important. Way more important than food if your just looking at a 24 hour time frame. She mentioned freeze dried food. Keep in mind that type of food would also cut into your water supply.