Sam's Club offers its members the Member's Mark 30-oz. Tumbler 2-Pack in several colors (Stainless Steel pictured) for $10.98 with free shipping. (Non-members incur an additional $1.10 surcharge.) That's tied with our mention from last week and the lowest price we've seen. (It's the best today by $2.) These stainless steel tumblers feature double-wall insulation and clear lids with sliding latches.