What's The Average Shelf Life Of Cocktail Mixers?

Whether you're preparing a home bar or serving drinks at an upcoming house party, you're going to need some cocktail mixers to pair with your spirits. And because cocktail mixers expire, preparation is key. Unopened store-bought, ready-to-drink mixer bottles can usually last 12 to 18 months (and some can even last up to two years). Once opened, however, the shelf life of most store-bought mixers — including most margarita, bloody mary, and piña colada mixers — is only about one to two weeks. This is an average that can vary based on brand and specific formulations, so always check the mixer's label if you're not sure.

Once you open a bottle, the mixer can foster bacteria and mold growth due to the sweeteners, citric acid, or other juices and dairy it might contain. You'll know a mixer has gone bad because it will smell and taste sour (or more sour than normal in the case of margarita mix), plus the color and texture will also change.

Premade mixer bottles are great for making multiple cocktails at parties, when it's more likely that you'll use most or all of the contents and not have to worry about the the leftovers spoiling. If you're making one drink at a time or are having a group of guests over that doesn't match the serving size of the premade bottles, there are plenty of online recipes for making your own cocktail mixers. This way, you can adjust the serving quantities to your needs. The downside to this is that a homemade cocktail mixer will generally only make it about seven days in the fridge, as it does not have the preservatives found in mass-produced mixers.

If you don't like the shelf life of premade mixers, brands like Stu's make cocktail concentrates that last up to six months in the fridge after opening. These are liquid blends of the spices and flavors of specific cocktails without the base liquid, which is the component that usually expires quickly. So where a traditional premade bloody mary mixer needs only vodka, a cocktail concentrate requires you add vodka and tomato juice. Another option is to use powder cocktail mixers, which last years and take up very little space in a pantry. When it's time to make a drink, each packet is mixed with water plus the spirit of choice to make a single cocktail.

And finally, you can go the full home bartender route, and use foundational mixers instead of relying on artificial sweeteners and flavors. Making cocktails this way takes practice, but shelf lives are longer. For example, grenadine can last months in the fridge and bitters don't really expire. Store-bought syrups last a few months, or you can make the syrups yourself according to your needs.

Depending on the type of mixers you use, they will last from as little as one week to several years. The type of mixers you choose to stock at home will depend on your approach to cocktails. If crafting the cocktail is as integral to your experience as drinking it, use foundational mixers. If you want to make a cocktail or two with little hassle, powder mixers last long and are easy to use. But if it's a party, premade bottles and mixer concentrates will work best. To keep the margarita mix from going bad, just tell your guests the party won't stop until the mixer bottles are empty.