Unopened and stored in a cool place? Years—seriously. Opened and drunk from directly? Three to five days, tops. Left in a hot car? Toss it—not because it’s poisonous, but because it’s probably developed a personality you don’t want in your mouth.
So next time you grab that lonely bottle from under the seat, ask yourself: “Has this been living the high life, or has it been through the wringer?” If it’s been chilling in the shade, you’re golden. If it’s been through a heat wave, give it a sniff and maybe pour it down the drain. Your taste buds—and your curiosity—will thank you.
