Here is mine:
It's four panes of glass. The two on the outside, and then two on the inside. So we when you look at the top, there are three open areas to pour sand. We poured sand in the first open area (this is our mom's pouring, by the way. They laid our foundation). Then you can remove the pane of glass that is surrouned by air to attach a photograph to it. That way you don't disturb the sand.
As for transfering the glass back home. I brought along paper towel and saran wrap. I shoved those paper towels in as tight as I possibly could. This prevented the sand from shifting and preserved the layers. Then I put the cover back on the vase. Then I wrapped it in saran wrap to make sure it wouldn't leak. Then I wrapped it with paper towels again so that it wouldn't break and put it inside a plastic bag and then inside my suitcase.