Lenore-
I am sure you could bottle the ice wine in a 750ml bottle. Ice wine is more costly and way more sweet. A little goes a long way, and I believe that that is the thought process behind a smaller bottle.
I'm only on my 4th kit, so I haven't stored any wine . I believe the instructions that George includes w/ the starter kit states that if you are going to store your wine longer than 6 months, add 1/4 tsp of k-meta before bottling. I am sure that someone will chime in. But when I bottled my chianti, I knew I wanted to store some longer, so I added it.