Over the past several months I have worked to get restaurants to consider switching from plastic to paper straws. While paper straws are more expensive than plastic, if you can do these two things you'll likely SAVE MONEY!
1) Buy your paper straws direct from Aardvark Straws (versus a distributor or competitor). If you mention my organization (Hannah4Change), you'll get a deep discount off of the retail price. Buying in bulk will also save you money.
2) Couple your new product with a new policy to only give out straws when a diner requests one. Don't automatically put a straw in each glass! You'll find that about half of your diners won't want a straw.
If you know of restaurants that have made the switch, please let me know. I am distributing window decals to those that make the switch, and trying to feature as many as possible in various online venues.