If you are using a shared PC make sure you log out at the end of your session. This protects your account privacy and especially important if you use a PC in a public library or an internet cafe.
I know this discussion is a few years old now but I only just noticed it. I've noticed bottles with the covering (not sure what to call it) in a painting of Hogarth's Midnight Modern Conversation, of which there are various versions of. Here's one that shows them bottom left and top right.http://www.thesundaytimes.co.uk/sto/multimedia/dynamic/00372/STL2935HOGARTH_372217k.jpgI think it was in a book about Hogarth by Lars Tharp or maybe it was about ceramics and Hogarth was mentioned. I'll see if I still have it.