When I received my first Sawyer Mini filter I threw away the bag thinking that I was going to use a smartwater bottle exclusively. Since then I have not actually needed to filter water although there were times that I should have. The very last time I should have processed water the source was deemed less desirable and so I just finished the last half mile dry as a bone.During that last hike I had been using a Platypus Meta bottle only to discover it had many faults and places where there were points of failure. [a] did not filter 100% of the contents, not even close [b] the main seal leaked depending [c] the main casket nearly came off/damaged on first use [d] too much potential to cross contaminate. So I decided to go back and try the sawyer again.First of all the sawyer mini would allow me to fill my Platypus 2L bag after removing the mouth piece. But then I needed to collect water and filter it. I started with my smartwater bottle. I quickly discovered that I could squeeze it but that I would have to release some pressure and reform the bottle for subsequent squeezes. When I released the bottle there was a slight squirt of dirty water onto my hands and surrounding so there was a chance for cross contamination. Also every time the seal with the dirty side is opened there is a chance it won’t be closed properly. It was not a happy place.I went back and watched some sawyer demo videos and I’m going back to the bag. This time I’m getting a 64oz bag. This way I can sit next to the source. Fill the bag and then go some place safe to process the water. I might fill one or two bottles as needed or just the one and keep the dirty water. Plenty of choices. The plan is to have a second 64oz bag in case it breaks as has been reported. And a gatorade or smartwater bottle for collection. (undecided about the clean water container).Parts:mini sawyer filter2+ squeezable bagsdirty water collection containersmall funnelpaper coffee filtersPS: with a tub or pot you can collect rainwater or consider the lay of your tarp to collect the rainwater into a bottle.