For the first several days while it rehydrates and gets bubbling again, on the counter and feed it twice a day. Afterwards, keep it in the fridge. I like to use spring lidded mason jars
Feed: One cup of flour and one cup of water twice a day? I know NOTHING fbout sourdough. And when can I start using? When it is bubbling?
This one:
https://www.amazon.com/Parfait-Fren...05230460&sr=8-8&keywords=spring+lid+mason+jar
Is a bit large--1 liter is 4.2 cups. you need to keep 1 to 2 cups of starter since most recipes want that much for the sponge.
I keep mind in the fridge with a label on it that says sourdough starter. It can get to looking fairly sketchy over time so you want to make sure your mother or mother in law does not "clean" it for you--and toss it down the drain...