I have developed a waterer for use in the Horizon shipping boxes when shipping birds. It is a 2 oz. refillable and reusable plastic tube with a watering nipple. I use the nipples for some of our birds and they are fantastic. It took our chicks about 5 minutes to figure out how to peck at the nipple and get water. You would fill the tube with water (even perhaps electrolyte water) and put it inside as high as necessary for the bird to be able to reach the nipple. When I ship birds, I wrap the bottom piece of cardboard with a puppy pee pad and tape it well. This keeps anything liquid from making the bottom soggy and possibly breaking through. I would suggest you use something like this that would keep any water from seeping into the cardboard. I am asking $2.25each for them. This covers the cost of the nipples w/ shipping and the time it takes for me to drill the holes, process the orders, go to the PO etc.I am not looking to make money on these...just to help keep birds hydrated in transit. I've used fruit but sometimes it is molded by the time the bird arrives, adding more danger. Each one will come with a nylon tie to attach it to the box. The are completely refillable and reusable. Please don't click on the BUY IT NOW...just PM me with how many you would like. My paypal address is [email protected] I can ship up to 10 waterers in a Priority mail flat-rate envelope for $2.95. Any more than than, please add $5.00 for shipping via Priority Mail. Thanks!!