This 18oz Avex Marco Autoseal Double Wall Insulated Water Bottle drops from $17.95 to $10.39 at Rakuten (formerly Buy.com). Plus, shipping is free, making this the lowest price we could find by $6 (it is also available from this seller on Amazon for $10.39). This water bottle can keep beverages cold for up to 2 hours and features a double-wall construction that helps reduce condensation. It is available in three color choices and is BPA-free. Sales tax is charged in most states.