Adding a few drops of vodka and a teaspoon of sugar can make cut flowers last longer. Posted on November 21, 2013 by admin Adding a few drops of vodka and a teaspoon of sugar can make cut flowers last longer. VN:F [1.9.22_1171]please wait...Rating: 0.0/5 (0 votes cast)VN:F [1.9.22_1171]Rating: 0 (from 0 votes)