Tsukuba Wiki: Know what the locals know...

[edit] What are they?

These are recycling bins for items that the supermarkets agree to collect. For example, the above picture shows Kasumi's bins for milk cartons, polystyrene trays, and aluminium cans. You can use these not just for items from that supermarket but from other places too.

[edit] Which supermarkets have them?

The following supermarkets have recycling bins:

• Jusco
• Kadoya (Aluminium Cans, PET Bottles, Milk Cartons)
• Kasumi (Polystyrene Trays, Milk Cartons, Aluminium Cans)
• Marutomi (Polystyrene Trays, PET Bottles)