Cocktail Shaker Lid with Silicone Seals for Regular Mouth Mason, Ball, Canning Jars Our Stainless Steel Lid Does Not Leak and Does Not Rust! We tried all the cocktail shakers for Mason jars on the market and found that all of them leaked when you were shaking them, either where the jar meets the lid or where the lid and small cap meet. Our solution was two custom designed silicone sealing rings, and now we can offer our customers the best product on the market! Stainless steel lid and cap with two silicone sealing rings included. All parts are dishwasher safe  you can remove the silicone seals and put them in the silverware area or leave them in. Mix your drinks in style! This unique Mason jar shaker lid is sure to attract attention and comments! Buy extras for your friends, because they are going to be jealous when you screw this awesome lid onto your Mason jar and whip up a batch of delicious martinis, margaritas, or your house cocktail of the moment! Use with any size *Regular Mouth* (2 3/8" internal diameter) Mason jar  make a small, medium, or large batch of cocktails by switching in a half pint, pint, or quart jar! Having a party? Keep backup quarts of cocktails in your fridge or freezer and just move this lid onto the new jars as you open them! Perfect for small spaces  no need to store a full cocktail shaker when you already have pint or quart jars in your cabinets! This lid will not fit wide mouth (3" internal diameter) jars.