Appears you are looking for a solution like this (from the CGI::Cookie perldoc)

Within a CGI script you can send a cookie to the browser by creating
one or more Set-Cookie: fields in the HTTP header.  Here is a typical
sequence:

my $c = new CGI::Cookie(-name    =>  'foo',
                        -value   =>  ['bar','baz'],
                        -expires =>  '+3M');

print "Set-Cookie: $c\n";
print "Content-Type: text/html\n\n";

To send more than one cookie, create several Set-Cookie: fields.
Alternatively, you may concatenate the cookies together with "; " and
send them in one field.
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Just do the Set-Cookie in your loop and the header after...