DIY Plastic Water Bottle Filter (LINK to My Instructions on the Process): So you find a plastic bottle out in the woods and are in need of a water filter as your day hike turned into an unexpected overnight and you're out of water. Just add ground up charcoal (not commercial as it has many chemicals in it, get it from your camp fire), sand, leafy green material and cotton between each layer then just add water for your own DIY water filter!
Using Aluminum Foil As A Makeshift Container For Boiling Water (Link To My Instructions on the Process): I keep Aluminum foil in every kit I carry, in my wallet and even on my survival bracelet. A container is without a doubt the hardest survival necessity to craft in the wild aside from a knife and I always have both on my person. If you haven't practiced using aluminum foil as a container I highly encourage it but do yourself a favor and use heavy-duty aluminum foil and essentially make a fist, place it in the center of the foil and then wrap the foil around your fist. You can see this skill in practice during a minimalist testing of a survival bracelet (See My Testing HERE).
***Note On Next Few Links- While boiling in a plastic container is possible it should be thought of as a last resort. If you are going to die of dehydration and have no other method to purify water then I personally would take the long-term risk of cancer over dehydration. You can make a burnt out container from wood, use a bamboo container and much more to avoid using plastic. So moral of the story, know how to boil in-case you only have a plastic container, know that heating plastic to boil water can potentially cause cancer long-term and know alternatives to make containers in the woods.***
Other Means of Collection and Purification to Look Into: In the last two years I haven't covered some of these things but do have plans to do so in the future but there are only so many posts I can fit into a week. So here are a few other things to look into for your kit and skill practice: 1) chlorine droplets per container to purify; 2) water purification tablet; 3) chlorine tablets; 4) bamboo boiling; 5) steripen; 6) other survival water filters; 7) distillation; 8) digging a hole beside a creek or river for cleaner water; 9) using clear plastic to collect water (several means to do this); and 10) water vines. While there are many more methods of obtaining and purifying water these will be more than sufficient to get you going on testing your kit and working on your water purification skills.