Take advantage of morning dew to collect water.
Wrap your ankles in clean clothes/towels.
In the early morning, walk through tall grasses where dew forms. Your goal is to soak up as much water as possible.
Once enough water has been absorbed, remove towels and wring out into your water container.
If your clothes are clean, you may attempt to drink the water without filtering, though it is preferable to treat the water as you would any other source.