I moved onto the plastic ones, mainly because they're inherently waterproof, while the Altoids tins are not.
I have two, one is from a Japanese supermarket and has the brand name Takeya, and what could be the series name, Porro, on it. Unfortunately, the USA website doesn't list these containers. I have one of the smallest, 110 ml capacity, about 2 7/8" x 1 3/16" on the inside. It has a simple snap lid, and weighs 1.3 oz. Right now it contains some dryer lint in a tiny zip-loc bag, a mini Bic, a sawed-off ballpoint pen refill (also a pen from a Swiss Army knife), a tiny soy sauce container refilled with contact lens solution, two tiny single-use eye droppers (from a pack of 25), a tiny MontBell compass, a Black Crater cord-lock light, and nail clippers for a baby, with room to spare. I know a Kershaw Two Can knife will also fit. (I've gone thru several iterations, and I don't think I brought this on my last trip. Nail clippers? Really? LOL)
The other is from the Container Store and has the brand name Sistema, and the series name Klip It on it. Sistema is from New Zealand. The Klip It has some clamps that secure the lid like the Lock & Lock brand, affording a very secure connection. The one I have is 200 ml capacity, about 4" x 2.5" on the inside. It weighs 2.0 oz. I just got this, so I haven't had a chance to fill it up.
On a related note, I switched to a Gladware Entree container on my last trip to hold all my sundries. The Entree size weighs 1.4 oz. and holds a lot, and keeps everything dry. I was tired of using a Zip-Loc bag for these items (which often fail) and the hard shell of this container made it very easy to find inside my pack with one hand. It contained my camera remote, phone battery, sunblock, duct tape, Mini 123 flashlight, Zebralight H30 w/JakStrap (yup, flashaholic), MicroPur (6 tabs), waterproof paper, earplugs, and a micro Sharpie marker with room to spare. (I'm still perfecting the contents.) It also made a nice durable "valet" of sorts in my tent at night for my wallet, knife, wedding band, and earplugs. Definitely a keeper. Rubbermaid has a similar item, weighs the same, holds less, but seems like slightly more durable construction.