noun
reverse vending machine; RVM
A machine that accepts used containers and returns a deposit or reward; common in recycling contexts.
駅の近くに自動回収機が設置された。
A reverse vending machine was installed near the station.
ペットボトルを自動回収機に入れると、ポイントがもらえる。
If you put plastic bottles into the reverse vending machine, you can earn points.
自動販売機 is a vending machine that sells items, while 自動回収機 collects used items.
Compound of 自動 (automatic) + 回収 (collection) + 機 (machine).