Amazon offers Prime members the RTIC 30-oz. Stainless Steel Tumbler with Lid, model no. RTIC30, for $9.39 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.40.) That's tied with our November mention and the lowest total price we could find by $9. It features a clear lid and stainless steel, double-wall construction.