This box is made of a banksai Pod and the ring and finial are sassafrass. It is 2" tall and 1" in dia. I couldn't get the top tight enough to make it pop when you pull the top off. I just couldn't get the vaccuum.:-)
Thanks guys and Chris they are sorta neat and you're right, they won't hold water or a vaccuum.
Rick, I shaped the pod and used a parting tool to flatten the top. I glued the sassafrass block to it. Then I shaped the finial and parted it off leaving the ring. I then drilled out the center.