Hard To Beat Deals via Amazon offers the RTIC 64-oz. Stainless Steel Bottle in Silver for $17.75 with free shipping. That's the lowest price we could find by $5, although we saw it for a buck less two weeks ago. It's double-wall vacuum insulated and features a screw top lid.

Also available is the 36-oz. model for $14.25 with free shipping. That's the lowest price we could find by $6.