When contacting a party rental business, don't be afraid to ask for exactly what you have in mind. You might be amazed at the sheer variety of tents, shelters, chairs, linens, glassware, and specialty items that a really good party rental facility has to offer.
For a spectacular display that your guests will be talking about for years, try a beverage fountain. It's up to you what you put in it, but they can usually handle sodas, champagne, and similar beverages. You can get them at most large party rental facilities.