Been buying these for years from 1%. Perfect for your tini jean pocket. Non magnetic if you go through a detector. Pack 3, poke a small hole on the edge for draw, tuck em in your jeans, your good all day! The glass cools fast also vrs metal ones. Did I mention their non magnetic? Great for vacations too!
Nice upgrade from metal bats. Remember to use the poker because it may break if you bang it. Filter paint came off when boiling to clean it thoroughly though.