Botach via eBay offers the Avex Highland Autoseal Stainless Travel Mug in Matte Olive Green (16-oz.) for $14.99 with free shipping. That's tied with our mention from a week ago as the lowest total price we've seen. (It's also a current low by $2.) It features double-wall vacuum-insulation, stainless steel construction, and is top-rack dishwasher safe.