Dust-proof and showerproof—although, despite the shower head-keyboard bunk-up in the picture, apparently not waterproof—this plastic laptop cover from Thanko is a glorified freezer bag. Available in A4 and B5 sizes, it is the plastic sofa cover of portable devices. Cost is around US$20, and I suggest using Cling-film instead. [Thanko via Akihabara News]