As one of its daily deals, 13 Deals offers preorders of this Instant Cooling Towel in Blue for $4.49 with free shipping. That's a buck below our mention from this past fall and the lowest total price we've seen. (It's a current low by $5.) It measures 31.5" x 13.5" and purportedly lowers temperature by up to 20° for a duration of two hours. Deal ends May 7.
Note: This item will ship June 1.