SIGG sports top fits all SIGG aluminum water bottles from size .3L up to 1.5L and SIGG Aluminum Wide Mouth Bottles. Will not fit the Steelworks .8L, metro mugs or vintage flasks. Top comes apart for easy cleaning. Hold base in one hand and grasp spout with other. Pull up and twist – spout will come off of base. Clean with small brush or cotton swab. Made in Switzerland of Polypropylene and Santoprene.