Step up your mixology game with the Masontops Mason Jar Cocktail Shaker Lids. These handy lids replace the need for a full sized cocktail shaker, which is a great perk for occasional entertainers or people in small spaces. They screw onto the mouth of any regular mouth Mason jar, so they work with jars you likely already have in your cupboard! Each set includes 2 strainer lids and 2 caps that double as a shot glass. Only compatible with regular mouth Mason jars.