This letter tells a manufacturer that you disapprove of some aspect of the way their package their product(s).
1234, Main Street
Boston, MA 02123
31 March, 2005
<Recipient Address Goes Here>
I have purchased <product name> <frequency of purchase>, and I have noticed something disturbing about your packaging. I feel that I must write to you about this matter.
I would like <suggestion>. Until I see such a change, I will stop buying your products.
Please contact me if you wish to discuss this matter further. Thank you.
encl: <List of enclosed items goes here>