I don't think these are anything special other then the one that also has the bolt. for those of us who have never seen anything other then the insulator itself.
I've found two bottles - one is a brown tin top bottle. The other green from the Big Boy Bottling Company of Columbia SC. There is writing on both bottles but I didn't write any of it down. Any information would be awesome. Thanks!
Welcome to Antique-Bottles.Net !!
Picture cropped...