How Long Do Seltzers Last

You know that feeling. You stash a few cans of hard seltzer in the back of the fridge for the perfect summer afternoon. Then life happens—work gets busy, the kids need rides, and suddenly, three months go by.

You pop open that can you forgot about. Is it still good? You sniff it. You take a tiny sip. Relax—you’re not alone in this little mystery.

The short answer: they last a while, but not forever

Most hard seltzers have a best-by date printed on the can or pack. Generally, that’s about six to twelve months from when they were made.

Think of it like that bag of chips hiding behind the cereal. It won’t poison you, but it won’t taste as fresh either.

What happens after that date?

Your seltzer won’t turn into a science experiment. It won’t explode or give you a weird disease. The alcohol—usually around 5%—keeps harmful germs away.

But the flavor? That’s another story. The carbonation starts to fade, just like a soda left open overnight. The natural fruit flavors can get flat or even slightly off, like a lemon that’s been sitting too long.

A personal example

Last spring, I found three forgotten cans of mango seltzer from a BBQ last summer. They were ten months past the date. I cracked one open, and it tasted like slightly sad fizzy water with a whisper of mango. Totally drinkable, but not the crisp, happy sip I was hoping for.

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My friend Dave said it was like drinking a memory of a party. Not bad, but not the real thing.

How to tell if yours is past its prime

Look at the can first. Is it dented or bulging? If it bulges, that’s a sign of spoilage—toss it. A dent might mean a tiny leak that lets air in, flattening the bubbles.

Then, listen. When you pop the tab, you want a crisp psshhhh. If it’s a weak sigh, you’ve got flat seltzer ahead.

Should you care about the date?

Honestly? You should care if you like flavor. Nobody wants to pay for a drink that tastes like cardboard fizzy water. That’s just sad.

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Plus, seltzers are often your go-to for hot days, picnics, or lazy Netflix nights. You deserve the full experience—bubbles that dance and a flavor that pops.

Storage matters more than you think

Here’s a secret: heat is the enemy. Store your seltzer in a cool, dark place—like your fridge or a basement closet. Leaving them in a hot garage or by a sunny window speeds up the “old taste” clock.

I once left a six-pack in my car for a week in July. Those cans tasted like warm regret and flat expectations. Never again.

The bottom line for your next shopping trip

Don’t panic about dates, but do a little rotation. Drink the oldest ones first—like you would with yogurt or eggs. Your future self will thank you when you crack open a fresh, bubbly can.

And if you find a can from two years ago? Toss it out of kindness. Let that seltzer rest in peace, and grab a new pack. Your taste buds deserve the best.