Speaking of storage, which we weren't, I have found that these are great for bundling a few inexpensive whistles into a backpack, conveniently and fairly safely: For about the cost of one cheap whistle.

http://www.leevalley.com/wood/page.aspx?c=1&p=41613&cat=1,41504

They are tool rolls designed for storing chisels, either in transport, or hung on the shop wall. I use the canvas one; but the leather ones are nice, and stronger.

W-O