Not sure if this is efficient.

declare
    l_org_table_name    varchar2(128) := 'My_Org_table';
    l_copy_table_name   varchar2(128) := 'My_Copy_table';
    l_sql               varchar2(4000) := null;
begin
    l_sql := 'create table ' || l_copy_table_name || 
             ' as select * from ' || l_org_table_name || ' where 1=2';
    execute immediate l_sql;

    --- do all your processing here
    . . .

    l_sql := 'drop table '||l_copy_table_name;
    execute immediate l_sql;

end;
/