That's an excellent and very practical question. Yes, the vast majority of modern plastic urban trash cans designed for outdoor use are UV stabilized to prevent brittleness and premature failure. This is a critical feature, as standard plastic left exposed to sunlight will undergo photodegradation. The UV rays break down the polymer chains, causing the plastic to lose its strength, become discolored (often turning chalky or yellow), and turn extremely brittle, leading to cracks and breaks.
Manufacturers incorporate UV stabilizers, which are additives mixed into the plastic resin during production. These stabilizers act as a "sunscreen" for the plastic, absorbing or scattering the harmful UV radiation before it can damage the material's structure. Common plastics like HDPE (High-Density Polyethylene) used for heavy-duty bins are almost always UV-inhibited.
When sourcing bins, look for specifications mentioning "UV stabilized," "UV resistant," or "weatherproof." Higher-quality bins will have this protection throughout the entire thickness of the material, not just on the surface. This stabilization significantly extends the lifespan of the bins, ensuring they remain durable and functional through seasons of direct sun exposure, reducing maintenance and replacement costs for municipalities and businesses. So, while no plastic is entirely immune to sun damage forever, proper UV stabilization is the industry standard for preventing the brittleness you're concerned about.