Fantastic, Miller4, I really admire what you've made here. The craftsmanship and pure ingenuity is inspiring.
quick update-
Just heard from my girlfriends cousin that the bottle I gave him for Christmas was in fact carbonated when he opened it. That makes 2/3, still haven't heard from my her brother if he's opened his or not.
Stoneware bottles were made by hand, mostly turned on a potter’s wheel using imported clay. Some were made in plaster molds. Wet liquid clay, about the consistency of syrup, was poured into a mold. The plaster absorbed the moisture at the point of contact with the mold creating solid walls. The remaining liquid was pored out and when the mold was opened the bottle was formed. The formed bottles were then glazed on the inside only with an Albany slip glaze, and then were side stamped with the proprietor’s name or the business name.
I was thinking you should glaze inside them.
http://www.mrbottles.com/galleryClayBeers.asp
http://www.mrbottles.com/newsDetail.asp?ID=36
I should go take a class again to have access to the equipment.