{illustrated example's 32oz Howler in collaboration with MiiR features a double wall with vacuum insulation to keeps things cold for 24+ hours and keeps things hot for 12+ hours. MiiR is known for using the highest quality Korean steel and their innovative, threadless clamp system that prevents leaks and gunk build up commonly found on traditional threaded closures. Drop by your nearest Livestock location to pick it up or check it out online now.