There's nothing quite like having freshly cut flowers in your house, but it can be pretty sad when they start to wilt a die just a few days later. But as you can probably guess, this grandma hack can solve that issue. To preserve your flowers for longer, simply add a half-and-half mixture of vinegar and water to a vase of water. The antibacterial properties of vinegar will help them maintain their freshness.
It'll also keep harmful microorganisms at bay, but only if you change the water and refresh this mixture every few days. If not, the antibacterial properties won't be as effective.