Most likely, you may also be able to find these at your local speciality gift store.
Engraved 3 Initial Vase - $18 Favors & Gifts
These even make great bridesmaid gifts... they can put their bouquets in them post-wedding!
I used their personalized stemless wine and highball glasses for couples shower hostess gifts. When I ordered them from Wedding Etc. (this was 2 years ago) they were a set of 4 stemless wine for around $20 and $25 for the highball set.
I love personalized gifts... and I think the so chic hostess(es) will too!