Starting in about the mid-2010s, hard seltzer became a popular alternative to beer in both Canada and the United States. From year to year, the popularity has only increased since then, meaning that there are many different varieties available to consumers. Custom packaging sleeves can help your product to stand out from your competitors in a way that captures buyers’ attention. What Is Hard Seltzer? Hard seltzer is a type of flavoured, sparkling water with alcohol added. The alcohol content of hard seltzer is about 5%, comparable to most leading beer brands. It has less sugar and fewer carbohydrates than