That's an excellent question! Finding the right outdoor bin for dog waste is key to keeping your yard clean and manageable. The capacity you need depends heavily on a few factors: the number of dogs you have, how often you walk them versus backyard cleanups, and your preferred emptying schedule.
As a general rule, I recommend a bin with a minimum capacity of 20 gallons (about 75 liters). For a single dog, a 20-30 gallon bin is often sufficient if emptied weekly. For two or more dogs, or if you prefer bi-weekly pickup, look for bins in the 30-50 gallon range. Think of it this way: a standard dog waste bag, when tied, is roughly the size of a baseball. You can fit a surprising number in a properly sized container.
Beyond sheer size, prioritize durability and odor control. Look for bins made of heavy-duty, UV-resistant plastic or metal with a secure, tight-fitting lid to contain smells and deter pests. A foot pedal or hands-free opening is a hygienic bonus. Remember, the goal is a functional system that makes cleanup easy, so choose a capacity that fits your routine without becoming an overwhelming task. A good rule is to size up once from your initial estimate—it's better to have a little extra space than to deal with an overflowing bin.