That's an excellent and very specific question. It speaks to a real problem in many urban areas. The short answer is: yes, absolutely, such bins exist, but you need to know the precise terminology and specifications to look for.
First, it's important to understand that "impossible to set on fire" is a high bar. In engineering and safety, the term is often non-combustible or fire-resistant. Trash itself (the contents) can still burn, but the bin's job is to contain and resist the fire, not fuel it, and to withstand deliberate arson attempts.
Here’s what you should look for:
1. Material is Everything:
* Heavy-Gauge Galvanized Steel or Perforated Steel Mesh: These are the most common. The metal won't burn, and a mesh design allows heat to dissipate quickly, starving a fire of oxygen. They are also incredibly vandal-resistant.
* Concrete or Cast Iron: Classic, heavy, and highly effective. They are essentially non-combustible and extremely durable, though less common for modern, high-volume areas.
* Specialized Composites: Some manufacturers use mineral-filled polymers or other composites rated as Class A fire-resistant. Always ask for the material's fire rating certificate.
2. Key Design Features:
* Self-Extinguishing Liners: Some bins use internal metal liners or fire-retardant plastic sacks that melt to smother a fire.
* Minimal Plastic Components: Ensure any plastic parts (lids, flaps) are labeled UL 94 V-0 (a plastic flammability standard).
* Secure, Vented Design: A tight-fitting, often metal, lid helps suffocate fires. Vents at the base or sides manage airflow to prevent intense combustion.
3. Certification is Crucial:
Don't just take a sales description. Ask: "Does this bin meet ASTM E-84 or a similar national standard for surface burning characteristics?" or "Is it tested to resist ignition from common accelerants?" Reputable suppliers for municipal and high-risk installations will have this data.
Where to Find Them:
Search for terms like "vandal-proof fire-resistant litter bin," "arson-resistant public waste receptacle," or "non-combustible street furniture." Major commercial and municipal suppliers like Titan, Glasdon, or Relite have specific product lines designed for this exact purpose.
In summary, while no bin can make contents magically fireproof, a properly specified, heavy-duty metal or concrete bin designed for high-risk areas will be as close to "impossible to set on fire" as modern materials and engineering allow. Your focus should be on material certification and proven vandal resistance.