Groupon offers the Contigo Autoseal West Loop Stainless Steel Travel Mug 2-Pack in Latte or Watermelon for $24.99 with free shipping. That's $12.50 per mug and the lowest total price we could find for two by $13. These vacuum-insulated mugs feature a 16-oz. capacity and retains heat for up to four hours and cold for up to 12 hours.