Seems you are in search of a view. Objects should generally not deal with STDOUT; code smell. This is just a terse example to demonstrate, not to recommend any specific packages.

#!/usr/bin/env perl
use strictures;
use Template;
package OHAI {
    use Moo;
    has [qw/ val1 val2 val3 /] =>
        is => "ro";
};

my $tt2 = Template->new;
my $hai = OHAI->new({ val1 => "I",
                      val2 => "CAN HAZ",
                      val3 => "C0DE" });
                          
$tt2->process(\*DATA,
              { thing => $hai });

__DATA__
Values: [% thing.val1 %] [% thing.val2 %] [% thing.val3 %]?
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