CONSTRUCTION: The stainless steel shaker top is constructed with robust 304 stainless steel, offering extended service life The sealing component is formed from flexible silicone to provide a closure MULTIPURPOSE: These shaker tops are designed for standard mouth glass preserving jars, perfect for mixing and dispensing seasonings, natural dried aromatics, salt, pepper, sugar, flour, and more The cover cap helps maintain contents ' dryness and when not in use Note: Not suitable for cocktail mixing—may leak COMPATIBILITY: These stainless steel shaker tops with silicone seals work with most standard mouth (74mm / 2.9 inch) glass preserving jars They are not intended for use with larger opening jars LEAK-RESISTANT: The edges of our shaker tops feature ribbed texturing for handling and resistance to slipping, making opening and tightening straightforward PACKAGE CONTENTS: Shaker Tops with Built-in Strainer (Jars are not included