Designed with your summer garden in mind, this Hummingbird Flutter Glass Birdbath Basin features a colorful embossed and hand-painted design. Fill the basin with about 1" or 2" of fresh water; no need to fill completely, shallow water is best for birds. Place clear glass or real stones in the bottom to adjust water depth. Basin will also attract honey bees and butterflies to help support your backyard habitat. Shallow design is perfect for smaller songbirds. Tempered glass is easy to clean. For longest life, bring indoors during danger of frost.