Cocktail Boston Shaker Set By Kotai (Gold) Boston Shaker set includes one 28oz Tin & one 16oz Glass^18/8 Stainless Steel Tin^Tin uses a thicker gauge steel for sturdiness and a weighted design^Tin is seamless for a more elegant look^Glass is Rim Tempered: heat is concentrated on the rim area followed by the cooling process allowing for a stronger more durable product. Boston Shaker set includes one 28oz Tin &amp; one 16oz Glass The18/8 Stainless Steel Tin uses a thicker gauge steel for sturdiness and weight Tin is seamless for a more elegant look 16oz Glass is Rim Tempered: heat is concentrated on the rim area followed by the cooling process allowing for a stronger more durable product.