For its newsletter subscribers only, Newegg offers the Timbuk2 Crater 13" Laptop Sleeve for MacBook in Black/Gunmetal, model no. 393-13P-6023, for $16.99. Coupon code "EMCWVWN24" cuts it to $7.99. With free shipping, that's the lowest total price we could find by $18. This sleeve features crater holes to purportedly cool your MacBook twice as fast and high density foam for protection. Note that although it's designed for 13" MacBooks, it should accommodate most 13" laptops. Deal ends December 23.