Least effective was a disposable GladWare container After about three days in the refrigerator, raspberries were showing some mold. I was surprised how long the broccoli lasted, but by about day six, it smelled bad. On the plus size, these are cheap, and it's no big deal if you leave them at a potluck or throw them out. Set of five entrée-sized containers, $3.29.

Premier containers from Rubbermaid nest together and have lids that snap to the bottom, so you can keep track of them. Both raspberries and broccoli lasted about a day longer in these than in the disposable containers. $2.49-$8.99 for container sizes 1¼ cups to 14 cups.

Fresher Longer Miracle Food Storage containers, sold at Sharper Image and Sur La Table, are air-tight with a rubber gasket and snap-down lid. They're made with plastic that contains antimicrobial silver nanoparticles. However, they are no longer allowed, by a quirk of government regulation, to mention the silver on the packaging. Raspberries didn't have much mold until about a week into the experiment, and broccoli still smelled OK after nine days. Set of 12, $49.95.

Fresh Vac containers have rubber gaskets and close with a lock-down handle on the side. You push on the top of a filled container a few times, forcing the air out through a vacuum valve. There's a satisfying whoosh when you open the valve to break the vacuum, which may be the simple reason I liked these best. In my experiment, the raspberries had a little bit of mold after 10 days. They're available at Sur La Table. Set of three, $39.95.