YOU SAID:

I'm pretty sure they just orders hot water that was filtered through a bag of dirt and grass before it went in the cup

INTO JAPANESE

私は彼らがカップに入る前に汚れや草の袋を通して濾過されたお湯を注文すると確信しています

BACK INTO ENGLISH

I'm sure they will order filtered hot water through bags of dirt and grass before entering the cup

INTO JAPANESE

私は彼らがカップに入る前に汚れや草の袋を通してろ過お湯を注文すると確信しています

BACK INTO ENGLISH

I'm sure they will order filtered hot water through bags of dirt and grass before entering the cup