>>910793+1 for gravity. i used to be gung-ho about the sawyer mini, but it's really only practical for a couple people for a couple nights when you'll only be needing 2-3 liters per person per day. if it's hot, or buggy, or you have more than a couple people you'll get real sick of squeezing those bags real quick.
>>911937viruses are generally not an issue for people in areas with the money and leisure time to go /out/. most don't survive outside a host in water very long, and any reputable filter will keep out bacteria and protozoa. no funny taste, no waiting.