I am a kind of Room
But people cannot stay inside me.
People can put some of us inside them.
For the rest of us, we don't recommend to put me in you.
I am not a washroom, yet I have lot of water.
Who am I?
You are a
Mushroom
I am a kind of Room
mushROOM - there is a wordplay tag
But people cannot stay inside me.
Mushrooms are too small
People can put some of us inside them.
Some are edible
For the rest of us, we don't recommend to put me in you.
Some are poisonous
I am not a washroom, yet I have lot of water.
Mushrooms have about 90% water content
You could be a
Cell
Because
A cell is a kind of a room - in a prison or monastery, for example
But
A cell is also a microscopic portion of a plant, animal, or microbe. You cannot live inside of one of these cells - they are far too small - but you can eat some of them (edible things) while others are toxic/poisonous.