With some simple tricks and very few items, you can construct a convenient handwashing station. Make a T-shaped wooden construction with some nails and some string. Drill a hole into both a tin and a half coconut shell (or similar containers). Attach both to the horizontal bar with nails. Put a bucket of water with some sterilizing iodine next to that construction. Put a small tin without holes next to the bucket.
The handwashing station is now ready for use: Just use the tin without hole to pour some water from the bucket into the tin with the hole. Now you can wash your hands happily!