As a sommelier and brewer, I can confidently say that the correct spelling for the fabric or foam sleeve used to insulate a beverage can or beer bottle is “koozie.” While some people may use the alternative spelling “coozie,” the majority of sources and popular usage support the spelling “koozie.”
The name “koozie” is actually a registered trademark of the Norwood Promotional Products company, which first introduced this product in the 1970s. Over time, the term “koozie” has become a genericized trademark, much like how “Kleenex” is often used to refer to facial tissue or “Band-Aid” for adhesive bandages. So, while there may be variations in spelling, “koozie” has become the widely accepted term for this type of beverage sleeve.
Personal experience has shown me that the spelling “koozie” is more commonly used and understood by both consumers and industry professionals. When working in the beer industry, I have encountered the term “koozie” in various marketing materials, product descriptions, and conversations with colleagues and customers. It is also the spelling used by major online retailers and beverage accessory manufacturers.
To further support the spelling “koozie,” I conducted a quick search online and found that the majority of results and references use this spelling. From e-commerce websites to online forums and social media platforms, “koozie” appears to be the preferred spelling.
While it is important to note that variations in spelling, such as “coozie,” may exist, the widespread usage and recognition of “koozie” make it the more commonly accepted spelling. Ultimately, the choice of spelling may come down to personal preference or regional variations, but “koozie” is the spelling that is most widely recognized and understood in the beverage industry.