It had been far too long since I had visited Makeshift Studio Galactic Headquarters, so I resolved that issue today.
This crystal decanter is an upcoming Christmas present for friends in dire need of one. (Interpretation: they enjoy wine and don't have a decanter.) I chose this particular decanter because its style will complement their crystal water pitcher; the decanter and pitcher will make a fine pair at the dinner table.
The punt at the base serves three roles: Inserting one's thumb into it makes it easy to hold the decanter while pouring wine into the glass. Pouring wine into the decanter directly onto the top of the punt helps aerate the wine, which is one of the functions of a decanter. Perhaps most important, its shape complements the rest of the decanter and makes it especially desirable to photograph.