What is the r value of a thermos bottle?

I've always wanted to know what the r value of a vacuum bottle is.
Thanks

just me2014-12-14T04:07:13Z

about $20 brand new from a shop

Trending Questions

Good mattress brands?4 answers Is clothes dryer exhaust coming through my window dangerous?9 answers Why am I not allowed to build a gigaton nuke in my backyard, can the HOA really stop me?5 answers What kinds of appliances uses up the most electricity?4 answers How do I get rid of mothball odor emitting from new refrigerator and freezer?4 answers