A love letter to passengers on the reverse of this bag:
We are doing our best to make this flight as comfortable as possible. Please
help us by keeping your environment clean.
The cabin crew will pass by your seat every now and then to collect the
refuse bag and some other items.
Thank you for your cooperation and have a pleasant flight."
All they have to do is to tell you how to put on your
lifejacket, and they could dispense with all inflight announcements
Thanks to Yonatan Mevorach (2007)