you can consider a eletricic lunch cooker from qoo10 you can steam, cook soup or porridge in it. Very portable and convienent
i think taiyo if I'm not wrong. i saw a small portable one. can cook soup too.
A cheap cheap one from giant will do bah. Cornell?
Anything from Mayer or Samsung is pretty good.
Check out those at Courts or Giant
Try searching from shopee
love baby (shopee)