Potentially this could have provided a really interesting link for I finally deciphered the lettering on the "fin" and it is Arrowhead Spring Water who are now part of Nestlé Waters North America. I made a telephone call to their Consumer Affairs departpment (not toll-free from the United Kingdom) to get an email address to which I could send a copy of one of these pictures. Despite his efforts the man I spoke to could not come up with an email address I could use!!!
Now come on Nestlé are you afraid your water might get polluted by an attachment to an email? This is the 21st century you know; which leads me to wonder which decade you are referring to in this quote from your web site.
"ARROWhead brand joins Nestlé Waters North America Inc. and is proud to be among the bottled spring water brands hand-picked for inclusion in the subsidiary of Paris-based Nestlé Waters S.A. For the next decade, ARROWhead and Nestlé Waters North America Inc. lead the bottled water industry with new and innovative packages."
Should you wish to contact me please do so at Jim