That's an excellent and very important question! Yes, it is absolutely a thing, and you're smart to be looking for one. Disposing of hot ashes from a public grill into a regular plastic or wooden bin is a major fire hazard. Thankfully, specialized hot ash waste bins are designed specifically for this purpose.
These bins are typically made from heavy-duty, heat-resistant materials like thick galvanized steel or aluminum. They feature a sealed metal container, often with a tight-fitting lid and a small opening to limit oxygen flow, which helps smother any lingering embers. You might see them labeled as "Ash Disposal Units," "Hot Ash Receptacles," or "Charcoal Disposal Bins" in parks and campgrounds.
When using one, always ensure the ashes are cool to the touch if possible, or use the designated shovel provided. Never dump flammable liquids on ashes. Using the correct bin prevents wildfires, protects park property, and keeps everyone safe. So next time you're at a public grill, look for that sturdy metal bin—it's the only place your hot ashes should go.