I suggest Teflon faced...
Bin

-----Original Message-----
From: William Lanford-Crick
To: 'General MEMS discussion'
Subject: [mems-talk] solvent bottles

         Hello,
         I am going to order some amber glass bottles from Fisher for
storage of photoresists and electron-beam resists (primarily PMMA in either
anisole or chlorobenzene).  There are a variety of cap options.  Can someone
recommend which is the best cap material for our applications?
         Options are:  Poly-Seal*-lined Closures, Polyvinyl-lined Closures,
Rubber-lined Closures, or Teflon* Faced PE-lined Closures.