Meritline offers this Stainless Steel 12-oz. Vacuum Thermos Flask
in five colors (Silver pictured) for $9.99
with free shipping
. That's $4 under the lowest total price we could find for any 12-oz. thermos flask. It features a screw cap which doubles as a mug and is suitable for hot or cold drinks.
Expect this item to take two to three weeks to arrive.