I have used commercial low fire glazes on raku without the reduction step in the trash bin.  The glaze looks like regular earthenware.  They should hold water ok.  Never used as drinking ware,but probably just as good as earthenware.  My understanding of the Japanese process fires to higher temperatures which means lower porosity.   Test and see.  The American raku glazes are most likely not stable in some drinkable  liquids, so glaze studies would be needed. l have fired some ware to