https://www.google.com/#psj=1&q=portable+water+filter&tbm=shop&tbs=price:1,ppr_max:35 THIS LINK provides a list of PORTABLE WATER FILTERS that can filter AT LEAST 50 gallons, and that DO NOT NEED ANY HOOKUPS.   Ranging in price from $10 to $35 and weighing between 1 ounce and 2 pounds.