I have been the recipient of a box full of plastic 2 oz. tubes and have added the watering nipple to it to serve as a waterer for birds in transit...especially for those that are being shipped. I'm not trying to make money from this...just perhaps save a few birds that are delayed more than 2 days in shipping. I pay $1.27 for the nipples plus shipping and since I got the tubes free I don't have to add that to the cost. I am going to sell them for $2.25 each plus shipping. That's not much $$ to assist in the bird arriving at it's destination alive and not irreparably dehydrated. They are refillable and reusable at home as well...think chicks!! I am going to put them in "Everything else for sale". Since I can only have one post for this, please get the word out to other BYC'ers that you think would be interested. "Saving shipped birds one waterer at a time!"