How can users store data temporarily in flask app?

[darktitan]

Hi
Im wondering how users in my app can store data temporarily?

Right now im using lists who shows some data the user inputs. It works kind off when the app is used locally but its starts not to show every thing etc in the lists when the app is used on heroku. And i realized that i cant use lists like that if multiple users us the app. Do any one have any ideas how i can do it?