let me give a quick preface here..
     because i'm working in my den on dial-up with my daughters,
   college hand-me-down laptop i have lots of time to kill
   while i'm waiting for downloads..so i keep something around
   to read..the book i had the other day was from a buddy who
   is into miltary history and he gave me a book on the Germans
   at the Eastern Front 41-45..a real potboiler with lots of
   old photos..one was a propaganda shot of a panzer grenadier
   heating coffee over a "methylated tablet stove". i say
   propaganda because he was wearing a heavy clean winter coat
   and smokeing a pipe..and the Esbit box was brand new..reading
   into the text it turns out that no Esbit tabs went to the 
   front because almost every train carryed ammo..not warm 
   clothes or heat tabs or even rations..but lots of ammo..
    OK..so on my desk is one of the big German Esbit stoves
   you get in a 4 pack from the surplus shops on the web..
    one thing led to another and i wanted to see what i could
   fit into the stove in the way of heat tabs and matches..
   by trial and error i could not make a small Bic fit in with
   the heat tabs...this is what i ended up with to carry in a
   pocket while on a day hike..    

   yes..i know there are several types of matches in the stove
   but like i said i was at my desk just picking things up that
   were in arms reach to see what would fit and work..
    so 3 US Army triox tabs in a plastic bag..and in another
    zip lock bag a book of MRE paper matches ..strike anywhere
    wood matches..the big headed REI flamers and a few 
    waterproof life boat matches ..  
    well not content with that i thought i would try out the
    stove using some old wood alcohol ration heat cans that
     i bought with the idea of using them in an old Sterno
      type stove called a Vulcan Safety Chief..well the ration
      heating can did not fit but will work in the Esbit
      stove so i went outside for a boil test...well i'm
      retired with lots of time to kill--      

      the old scout cook kit pot is used on all my boil test
      and any modern stove will bring it to a boil in about
      3 minutes..the Wisperlight windscreen is sort of a cheat
      but in the field i would make a windbreak out of stone
      or logs..the cup did not fit on the stove --     

     it took about 4 minutes to get the water "warm"..
     about 6 to get it to cocoa making temp..hot but not
      boiling..and to get up to a full boil took almost
      20 minutes..by the way the air temp was in the 50's
      HOWEVER---     

       after 20 plus minutes of testing the can still had
      enought wood alcohol fuel left to heat another ration
      or make a cup of tea..a triox tab would have burned 
      out...so anything learned from all this??
        well for one i would stick to the most modern stove
       i could afford for any real survival gear bag..
        surplus odds and ends and make-do are ok for casual
        hikes or just fooling around to see what they would
         do but i would not stake my comfort let alone my life
        on anything but the best..