Make's Sean Michael Ragan reviews an old-school Dymo Metal Embossing Tapewriter he found cheap on eBay and finds it to be an eminently satisfying piece of kit. There are modern versions but they'll cost you lots more, and this thing is pretty much indestructible so there's no reason not to buy a cheapo one on eBay.
But in terms of construction quality and durability, the Tapewriter is as far removed from those cheap plastic embossers as a Mercedes is from a Kia. It’s 10″ long, weighs almost two pounds, and is made almost entirely from cast aluminum, with steel fittings here and there, and all held together with machine screws. The only polymer in the thing, as far as I can tell, is a rubber friction coating on the internal tape drive wheels...
Embossed aluminum is pretty much the ultimate labeling material. Without wanting to be morbid, there is a reason why military services around the world choose it for personnel identification tags. Secured with mechanical fasteners, instead of adhesives, an embossed aluminum label will stand up for years against water, extremes of heat and cold, prolonged direct sunlight, and any organic solvent you care to throw at it. This is a true “industrial-grade” labeling tool, and if you can snag a used one for a reasonable price, you can expect a lifetime of use from it.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.