I don't remember. Maybe they were Grolsch like. Top was definitely porcelain, not plastic.

Article about Grolsch bottles and home brewing. Says the gaskets are like 100 for $6.

http://grolschbottles.com/grolsch-style-bottles-for-home-brewing/
_________________________
Thinking of cracked-out and/or tweaking whores getting their throats and asses brutalized for the next hit makes me hard. --Rear Admiral