Apparently Party Packagers is now called Party City...
This is the place to go when you are looking for party supplies for any type of party you're holding. No matter what you're celebrating, they will probably have it. Prices are decent but I think their glow stuff are a bit overpriced. Party City can get really busy in October because that's when everyone goes costume shopping. Be sure to go early in October so your costume is still in stock and you can avoid the long lineups. However, why not save money and trade costumes with friends or people on Kijiji? That's what I did last year.
The line to cash out can be quite slow and long because they only have 2 people working on cash.