DECANTER USAGE AND TUMBLERS?

[snow girl]

Hey! I have a quick question.

I recently was presented with a decanter and a set of 4 tumblers on a stand. The decanter of course, is normally used for wine.

1. Is it okay to use it for spirits as well? If so, what kind of spirits? (And how do i make sure that the decanter is better suited for wine or spirits? are there many types?)

2. Also, is is acceptable to use the tumblers for wine? Im curious as to why they were given with the decanter on the stand if the decanter is in fact used for wine.

Thank you!!!