Here's the perfect travel thermos flask.
The Zojirushi Tuff Boy, unbreakable stainless steel vacuum bottle.
The new innovative design makes it lighter and more compact than other bottles of the same 1.5 liter capacity. (51 ozs.) It has a wide mouth design for easy cleaning and added versatility, such as accommodating full size ice cubes. It has a comfortable rubber retractable handle and also and adjustable shoulder strap. The pour thru stopper is of an advanced leak-proof design that locks tight. (You know, when it's closed.)
The interior is an easy to clean non-stick finish over steel that eliminates flavor cross-over from one liquid to the next. The lid conveniently turns into a cup, and comes with an extra inner cup to share with friends. This high quality flask has an amazing thermal rating. With a starting temperature of 203 degrees, coffee kept inside for 6 hours, will still be 174 degrees, and if kept for 24 hours, will still be a drinkable 133 degrees. WOW!... what thermal retention!
It comes with a 5 year warranty from Zojirushi; ships in a gift box; made in Thailand. 4 1/2 inch diameter without handle x 10 3/8 inch tall.
Remember, Zojirushi invented the steel vacuum insulated flask bottle, and has stayed ahead of the rest on the cutting edge of design.