The packets are shampoo or laundry soap or similar things.
Many people here don't have the ready cash for entire bottles of things so they buy the packets as needed.
Not as surprising as I thought.

This might be also sort of "portability" of their life, poor and not having sometimes a place to keep any belongings. It's sad.
I have been in several homes, of different types according to their tribe and even a couple of city homes. Most of them are very unlike what we are used to or consider normal.
In ethnic villages walls are one board thick, as are the floors and rooms may be divided only by a fabric curtain.
There is nothing much extra and really no place to put it if there was.
There are not closets that I remeber, there might be open shelving and any possessions are hung on hooks or nails.
There might be a water spigot but that is usually water draining from a large metal drum on a high platform.
It is difficult to explain the difference in their lives because, from the very basic items, it is differently arranged and constructed.
Even the home of most wealthy is rather sparely furnished, floors might be tile and there might be stucco inside walls but the furnishing is rather barren. If there are 'easy' chairs they are large and wooden and quite uncomfortable.
My son was just in Yangon and had dinner at the home of very distant, very wealthy acquaintances.
There were 4 people and 8 or 9 servants to attend them - and several armed guards around the house which was surrounded by a high cement wall with glass shards embedded on the top.
I will show another example in the following message to illustrate how close to the bone these people live.