As one of its daily deals, PricePlunge offers the Thermapak 12" HeatShift CoolGuard Netbook Sleeve, model no. HSN10A, for $3.99. Coupon code "passfor5percent" cuts it to $3.79. With $1.99 for shipping, that's the lowest total price we could find by $7 and the best price we've seen. This sleeve cools your netbook while you work and when it's in storage. Deal ends today.