This Cool Gear 20 oz. ECO 2 GO Chiller 6-Pack drops to $19.99 today only at Woot. Even with $5 shipping, this is a fraction of the next-best price we saw on Amazon, which was one (1) cup for $12.89! That's like getting 4 free. This BPA-free design is made to pop into the freezer and then fill with your favorite beverage. There is a limit of 4 orders per person and this deal ends if they sell out. Sales tax is not charged in most states.