When filled with water, Water Slice can be lifted out and placed in a hanging basket without dripping. Material holds air, as well as water, promoting healthy root development. For hanging baskets, houseplants and pots. Amazing new material quadruples in size when water is added. Then it releases it gradually over days and weeks as needed by your plants. This innovative new polymer was developed in Scotland. When dry, each Water Slice is only 2-1/4" x 3/5". But it swells to 4-1/2" x 1" when water has been fully absorbed. Useful for summer plantings in containers and hanging baskets. Also for taking care of houseplants during vacations, when placed out of direct sunlight. Can be re-used. Each blister pack includes three Water Slices, complete with instructions and suggestions for use.