they were made out of California way back. Trico was the name of the company .I still have a copy of there ad from a magazine . I found a company in California and same city with same name . I talked to somebody and they said they didn't have the mold for the bottles as they bought the company from the pervious owner. they used to sell wads also I try to find add and see if I can scan and put it on a thread. the only place I see them is on E-bay . somebody who does plastic molding I lend one of my bottles for a template it would be nice to have that Item back in production. Larry Swentzel
here we I go found it . Trico plastics 590 S Vincent Ave. Azusa ,California 91702
818-969-1891 paper is dated Dec 23 1991. it shows a stock forend for Remington 870 110 1187 scope cover 12 20 .410 wads if some one has the Jan/Feb. 1992 of Handloader page 9 is the add. Larry Swentzel.
I have one of those bottles I am not using. It is slightly bigger in diameter than a standard MEC bottle, and won't fit thru the MEC bottle brace. I'd swap for a large MEC bottle plus postage if anyone wants.