Hi all, newbie to this forum. I am going backpacking in Yellowstone in July. I plan to take a Sawyer Squeeze for filtration. I am noticing that there is the Squeeze, the Mini, the model 131 and 137 and now I see that there is something called the Sawyer PointOne Squeeze. I pretty much understand the Mini and the 131 & 137 but could someone please explain what the "PointOne" is? I just want to filter water for drinking, cooking etc. Thank you very much.