YOU SAID:
I picked up the glass of water which was near the flower pot.
INTO JAPANESE
私は植木鉢の近くにあるコップの水を拾った。
BACK INTO ENGLISH
I picked up a glass of water near the flowerpot.
INTO JAPANESE
植木鉢の近くでコップ一杯の水を拾った。
BACK INTO ENGLISH
I picked up a glass of water near the flowerpot.
That didn't even make that much sense in English.