That's a great and very specific question! Yes, they absolutely exist, and they are becoming more common in cities focused on reducing litter and fire risk. You're describing a specific type of public waste receptacle often called a "combination bin" or "multi-stream bin.
These units typically have a main compartment for general waste or recycling, and attached to the side or integrated into the design is a smaller, metal bucket filled with sand. The sand serves several purposes: it extinguishes the cigarette ember immediately, prevents wind from scattering butts, and reduces odors. You'll often find these bins outside office buildings, in public parks, near transit stations, and in designated smoking areas of venues.
They are a practical solution, as regular trash bins can pose a fire hazard if hot butts are tossed in. The sand bucket provides a safe, dedicated spot for disposal. So next time you're in a well-maintained urban area, look closely at public bins—you might just spot that handy sand bucket.