I saw that trick yesterday at the Fairmont San Francisco. I had to share it with you. It looks great on the cucumber water and the lemon water as shown here. But it would be even better for sangria, punch and any other summery cocktails.
The idea is that instead of putting the ice cubes directly in the drink, which will water down your drink on a hot day, you insert a tall square vase into a jar to separate the ice cubes from your beverage. A tall square vase is easy to find at your local florist shops.
Depending on the beverage, it may be appropriate to place an ice bucket with tongs next to the jar to fill the glasses with ice cubes before serving.
If you wish to make your own flavored water, check out my recipes:
Take a tasty cucumber, the fresher the better. Cucumber with smaller seeds delivers a more refined look.
September 26th, 2009 Update: Since this post, I learned that the manufacturer of these square canisters is Cal-Mil. Click here for more details.