The housing of BeoPlay H3 is milled from a single block of high-grade solid aluminium.

ENGADGET: B&O Play H3 and H6 bring Bang & Olufsen's newer badge to headphones

The stumbling block in this analysis is that the person who walks into a showroom to buy a brand new aluminium car is unlikely to capture all those lifetime benefits.

ECONOMIST: Tech.view: Unbearable lightness? | The