There's a wide choice of Thai and foreign food, including Japanese and Indian. My tasty Japanese bento box wasn't very expensive (around $4), and my friend's egg and noodles was excellent. Both came with free miso soup of course. Soft drinks and herbal drinks available.
As usual in food courts you buy a cash card in advance, pay your food, and receive the leftover balance back.
Mega Bangna 2nd floor
38 Moo 6 Bangna-Trad km. 8
Bang Phli, Samut Prakan