Axiom's Beer Basket LX—it's just the thing you need for running errands by bike. Its tubular aluminum is durable and the UV protected real wood slats has plenty of room for bags, produce and beverages. And, it installs on almost any rear rack (sold separately) via an ingenious spring-loaded attachment and has a carry handle for off-bike use.
Capacity: 55 pounds or rack capacity (whichever is less)
Dimensions: 16.5 x 14 x 10 inches
Weight: 1,990 grams