That's a great observation, and you're definitely not alone. Seeing plastic bins crack and become brittle in freezing temperatures is a common winter headache. So, let's talk about whether metal is the better choice.
In short, for pure cold-weather durability, metal bins generally have a significant advantage. Most plastics, especially standard resins, become less flexible as temperatures drop. This makes them prone to cracking from impacts, like being knocked over, or even from the pressure of frozen contents expanding inside. Metal bins, typically made from galvanized steel or aluminum, don't become brittle in the cold. They can withstand physical impacts and temperature extremes far better without structural failure.
However, it's not a simple "metal wins" answer. Here are the key trade-offs:
The Case for Metal:
* Cold Resistance: Excellent. No brittleness in freezing conditions.
* Durability: More resistant to cracking, chewing from animals, and general wear.
* Weight: Heavier, which can make them more stable against wind.
* Fire Resistance: A clear safety plus if someone discards hot ashes or coals.
The Considerations for Metal:
* Corrosion: Cheaper metals can rust over time, especially if the coating is scratched. Look for "galvanized" or powder-coated finishes.
* Cost: Usually more expensive upfront than basic plastic models.
* Noise: Can be loud when emptying or if items are tossed in.
* Denting: While not brittle, they can dent from heavy blows.
* Winter Specific: The metal itself can get extremely cold to the touch, and in rare cases, wet waste might freeze and stick to the interior.
Plastic isn't all bad: Higher-quality, thick polyethylene plastic bins (often labeled as all-weather or commercial grade) perform much better than thin, residential ones. They contain additives for UV and cold resistance. For mild winters or budget-conscious buyers, a high-grade plastic bin can be a viable option.
My Verdict: If you live in an area with harsh, freezing winters and want a bin that will last for many seasons without cracking, investing in a quality metal trash bin is the more reliable choice. Look for galvanized steel with a good coating. For moderate climates, a heavy-duty, all-weather plastic bin might suffice. Ultimately, the best choice balances your local climate, budget, and how much wear-and-tear you expect.