Formal — to staff
Garbage · Separation
You
すみません、ペットボトルのキャップとラベルは、どこに捨てたらいいですか？
すみません、ぺっとぼとるのきゃっぷとらべるは、どこにすてたらいいですか？
Excuse me, where should I throw away the caps and labels of plastic bottles?
Romaji: Sumimasen, pettobotoru no kyappu to raberu wa, doko ni sutetara ii desu ka? / Reply Romaji: Kyappu to raberu wa moeru gomi de, botoru wa pettobotoru no kago ni irete kudasai.
Reply
キャップとラベルは燃えるゴミで、ボトルはペットボトルのカゴに入れてください。
きゃっぷとらべるはもえるごみで、ぼとるはぺっとぼとるのかごにいれてください。
Caps and labels go into burnable trash, and the bottles go into the PET bottle basket.
Gesture & etiquette
Hold up a plastic bottle with cap and label, looking confused.
Japanese garbage rules are strict. Always try to follow the provided instructions (often with pictures). When in doubt, it's better to ask or assume it might be burnable if no specific category is clear, but asking is best.