Cable ties are included to put around the section where the bottle goes in. These waterers work better and stay tighter on the bottle with a cable tie. These hang on the outside of your pen and project through the wire about 2". They fit easily through a 1" x 1" wire opening. These pop bottle waterers are made here in the United States by a small company that has been in business since 1974 producing this line of feed and water containers for caged animals and poultry. Rusty stretched-out springs are a thing of the past due to the unique plastic strap on these pop bottle waterers. They are boil and freeze-resistant for strength and sanitation. We have several more sizes and styles of waterers and cage cups in the Pinnon Hatch Farms Amazon Store. The pop bottle waterers are all white which is more UV resistant and will keep your water cooler and fresher. All of our feed and water cups are made in the USA. I have used hanging water cups for many years on my farm. The advantages I see to the hanging water cups are that they stay cleaner because my chickens aren't as prone to kick dirt in them, and earthworms don't crawl into them and die. Water and feed bowls sitting on the ground can also become a home for vermin and insects. I have a lot of movable pens that I try to keep on fresh grass, and it is a lot easier if the cup is hanging on the pen. Fresh Clean Water = Healthy, Hydrated, Happy animals. This is an excellent product, as always whenever possible, I personally and we here at Pinnon Hatch Farms buy and sell American Made. Returns may be subject to a 20% restocking fee.