Now, for $10/bottle you can get some nice drinking wies, but probably not something can necessarily age for 21 years. Most wines in that price range tend to be ready for current consumption and will not improve with age. Also, for a wine to age well for 21 years it needs to be stored at proper temp and humidity for the long term -- many people can't maintain constant 57 degrees for a long time.
Age worthy wines tend to lean more towards premium Bordeaux, good California cabernet, and some of the more expensive Spanish wines.
A couple options:
1). spend the money on a couple $40 bottles that have good aging potential
2). buy the case as a gift but recognize that the wine may not last
3). buy a nice bottle of champagne for the friend to celebrate with and give the baby a savings bond
I hope this helps. Feel free to email me if you want more suggestions .