I have made mine in both a 12" spring form pan and a tube pan. I like the presentation of the spring form pan better. I lay the rings in a circle overlapping up to the cutout and place a cherry there in the partial exposed cutout. The tube pan is only big enough for four pineapple slices. My kids love PUD (thanks Andy for the shortcut). I could make it every day and they would never get tired of it.
Today I am going to attempt to make the 7-Up biscuits to eat with my Porterhouse steak tonight. Only four ingredients.
7-Up® Biscuits Recipe - Allrecipes.com
Will report back on them.