I am married to a malaysian and just checked with my MIL and SIL and they both said in public even covered is a big no no. Also in parent rooms you must be covered up.
Having to feed in a toilet sounds gross and dirty but if you are out and about and cant find a parent room make sure you duck into a toilet cubicle and you will be fine!
So in a parents room still cover up and out in public find a nice clean toilet!
Hope that helps