Stockpile of plastic sockets.

Here's 95% of all my plastic sockets. They're all in great shape, despite the conditions some of them have been used in. (Some of these sockets were extracted of fixtures using 100 watt lamps!) These are my personal choice of sockets with vacuum (non-gas filled) lamps of 25W and less, because those lamps don't get hot at all. I sometimes use them where ceramic sockets would be too fragile or easy to break.

I also a few plastic and rubber sockets of other sizes (E12, E17) not pictured here.