Photo: pinterest.com ANSWER It's a Glass Rolling Pin! This vintage rolling pin from the 1950s. Keeps dough chilled before baking because you can fill it with ice or warm water as needed for your particular recipe. More sanitary than wood rolling pins too. It's hard to find these pins with their original lids in place. The cool part is that you can use it for something other than the kitchen. Fill it with things to display! And the lid screws on snugly so no leaks when rolling out with chilled off water for pie crust or warm water for cookie dough.