Chrysal Bulb T-bags extends the vase life of all bulb flowers like Lilies, Glads, Alstro, Iris and Tulips. It is specially formulated to replace the nutrients that bulb flowers are deprived of when they are cut from the ground. This item can be used for all non-bulb flowers as well. They are pre-measured pouches that are dropped into 2 quarts of water. The T-Bag simply dissolves in a matter of minutes and remains in the bucket as a visual reminder that the water has been treated. It prevents leaf yellowing, increases flower size and intensifies color.