does sugar and vinegar REALLY make your cut flowers last longer??

Does sugar and vinegar really make your Cut flowers last longer. I read this online, but I was skeptical. After the second day I could maybe see that the flowers in the vinegar and sugar water we’re doing slightly better than plain water, MAYBE. After the third day of flowers look the same. So overall I don’t think it works. If you’ve had a different experience or, know of something else that really does work, Other than refrigeration because I really don’t want to keep the beautiful flowers in the refrigerator. Please comment below thanks for watching