2 PCS Padded Tri-fold 3 Pocket Wallet-Style Filter Case for Circular Filters 40.5mm 49mm 62mm 43mm 52mm 55 mm 52mm 58mm 67mm 72mm 77mm 82mm CamDesign Wristband Lens Focus Ring (2 Pieces)

I think this item shows the right balance between price and quality. While not made of the most durable materials or construction, I feel that it is sufficiently durable to stand up to years of use. The design is such that the filters are reasonably protected from dust and abrasion, without adding extra bulk or cost. A good choice for the price.