Amazon offers the Cooler Master NotePal X-Slim Ultra-Slim Laptop Cooling Pad in Black, model no. R9-NBC-XSLI-GP, for $14.95. Redeem this $10 mail-in rebate to cut that to $4.95. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping adds $9.28.) That's the lowest total price we could find by $10. It hold various laptop sizes, including 15" and 17", and features a 160mm fan and two height settings. Rebate ends April 30.