Abstract: A portable water purification kit and filter wherein the filter is comprised of a bed of particulate adsorbent material in a flow through casing provided with end caps, with one of the caps being a flexible cap, which is capable of being deformed for the application of a force to water flowing in the casing to increase the rate of flow through the particulate adsorbent. The filter is included in a portable kit for water purification comprised of a kit package which is a container for water having a removable cover, with the water filter and a tablet package, which includes a plurality of bacterial disinfectant tablets being included within the water container to provide a unified package.