Oh, I feel your pain! Discovering rust at the bottom of your outdoor trash bin is a real nuisance. It weakens the bin, can create leaks, and just looks unsightly. The good news is, when you go to replace it, you have several excellent "no-rust" material options.
First up is Stainless Steel. This is the premium choice. High-quality stainless steel (look for grades like 304) is highly resistant to rust and corrosion. It's incredibly durable, has a sleek, modern look, and can handle harsh weather for years. The main drawback is the higher cost and it can show dents.
The most common and affordable rust-proof option is Plastic/Resin. Modern outdoor bins made from thick, UV-stabilized polyethylene are fantastic. They're lightweight, won't rust or corrode, and are easy to clean. Look for ones with sturdy construction to prevent cracking in freezing temperatures. Colors won't fade as quickly as they used to.
Another strong metal alternative is Galvanized Steel. This is regular steel coated with a layer of zinc, which acts as a sacrificial barrier against rust. It's very sturdy and often more affordable than stainless steel. Over a very long time, the coating can wear, especially if scratched, but it provides excellent long-term protection.
For a different approach, consider Concrete or Stone Composite. Some high-end, built-in bin enclosures use these materials. They are completely impervious to rust, extremely durable, and can be very aesthetically pleasing, though they are permanent and not movable.
My advice? For most homeowners, a heavy-duty plastic bin offers the best value and worry-free performance. If you want a heftier, more permanent feel and don't mind the investment, stainless steel is a top-tier, lifelong choice. Just be sure to avoid plain, coated, or painted thin steel bins, as those will eventually succumb to rust just like your old one did.