Plus 1 on Sawyer. I do not have the. 02 but I have 2 of the all in one kits which include the point one filter, bucket kit, and a couple of bags to use as the squeeze filter. I think I paid about $70 a piece for these. I use one in the squeeze formation for backpacking. The other one is in my wife's bob in her car. These are great filters...especially for the price. Throw in a bag of pool shock and for less than $100 there's more safe water than you could drink in a lifetime.
I agree we have the 1 and I just invested in a 2. For the price you are getting the most water.