The Brooder Bottle Cap™ will fit a standard recycled soda bottle . The Brooder Bottle Cap will help you provide clean fresh water to your baby chicks as well as start them on a water drip earlier in life. Our caps also make a great addition to your isolation cage should you have a injured or sick bird. Best of all your new chicks will have access to fresh clean water all while prevent them from accidental drowning. Please note: colors may differ Instructions: Using a clean soda bottle (12oz 16oz 20oz or 2L) fill with clean water using a clear bottle will help you keep an eye on your water level. Securely fasten our Brooder Bottle Cap™ to the top of the bottle. Invert the unit and poke a small hole in the bottom of the bottle. Please Note: It is very important to poke a small hole in the bottom of the bottle to allow air to balance within the bottle. Failure to do so may result in improper water flow or no flow from the bottle. Hang your brooder bottle from the side of your brooder or cage at a comfortable level for your bird(s). You can use any type of wire to securely affix the bottle to the side of the cage i.e wire hanger picture hanger wire fence wire electrical wire etc. Make sure that your bottle is far enough away from your heat source so the water does not get hot. If you have chicks of different sizes set the drip for the highest bird and provide a step up for the smaller ones ensuring it does not hinder access to the larger birds better yet get extra Brooder Bottle Caps™!