C# Multiple form application using same instance of object?

I have multiple forms that would need to communicate with database. I have an embedded database sqlite which requires only one dll file. Main form creates SQLite objects

using System.Data.SQLite;
...
public  SQLiteConnection sqlite_conn;
public  SQLiteCommand sqlite_cmd;
public  SQLiteDataReader sqlite_datareader;

which are initialized later in code. My question is , if I have multiple forms that need to communicate with database, is it better practice to give them using System.Data.SQLite and create their own instances of object or somehow use the same object from multiple forms, not at the same time...