Our ½ gallon growler caps are designed to easily twist onto amber glass growlers. The metal material is practical because of its durability, and the white color looks great, too. Best of all, buying bulk growler caps ensures that you always have them in stock when a customer brings their growler back to your establishment. To find other products to use for your beer service, check out our beer glasses, beer dispensers, and beer keg dispensers. If you're wondering where to buy growler caps, we have a large selection of growler caps for sale at the lowest prices.