You'll find Le Petit Bar directly across from La Creperie, so you can buy a kitschy souvenir glass o' girly booze right after you've stuffed yourself with a crepe.
What's really hi-larious is all the fratty guys in line to buy plastic Eiffel Towers full of strawberry margaritas.....This is not macho! Be a man...go drink some whiskey....out of a broken bottle.....
Anyway, you can get one of the aforementioned Eiffels (32 oz., I believe) or a ceramic Paris balloon (24 oz. according to my searches on the interwebs) for $15. Then you can go walk around the Strip and look silly, but isn't that what Vegas is all about?
You can also get these drinks at the outdoor bar right in front of Paris's casino entrance, which is open later (Le Petit Bar was closing up at 11 p.m. when I was there).