A Chinese translation of the Sanskrit pari/sra^van!a. A "water filter"， one of the six necessary possessions 六物 of a Buddhist monk. Since a monk， in the process of drinking water has the possibility to Ina-Zdvertently killing the bugs which might be living in the water， he/she is obliged to filter the water first. This is especially important to have while traveling. Also written 滤水囊