Made of 100% sucrose, an important energy source for hummingbirds. The 32 oz. bottle makes up to 4 quarts of red nectar. The red nectar in the 64 oz. bottle requires no boiling. Just add water to the 32 oz. bottle of liquid concentrate to make up to 128 oz. of nectar. The red nectar in the 64 oz. bottle is ready to use. Pour directly into your hummingbird feeder.