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Bike lights
(slrpnk.net)
I bought a Patagonia one ~10 years ago, mainly because of their suggestion that it should be built to last and that they offer repairs for anything that breaks. I use it pretty much everyday and it's still pretty much good as new! Expensive outlay but worth it long-term I think.
I've been tempted by a Blunt umbrella but I'm sure I'd lose it immediately! I've been wondering if I could attach some sort of tracking device to it haha