Amazon offers its Prime members the Zojirushi 12-oz. Stainless Steel Mug
in Smoky Blue, model no. SM-KHE36AG, for $20.99
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.44). That's tied with our September mention and the lowest total price we could find by $3. It features vacuum insulation and a non-stick interior.