We’ve tried a bunch of Boston shakers over the years (pint glass and large metal tin). We find the ones from Cocktail Kingdom to be superior in every way. The weighted 18/8 stainless design of this large 28oz tin is designed to couple with its smaller counterpart (you need both to make a working set). Sure, you can save a little money and buy another brand, but you cannot buy a better seal at any price. These work and feel the best.