Redditor fabricates DIY "Iron Man" arc reactor out of cardboard, a cell phone battery, and a tuna can - CNET

If you're looking for a low-budget Tony Stark costume to wear to "Captain America: Civil War," check out this wearable arc reactor posted by Redditor iltl64 over the weekend, made mostly out of garbage you can probably find in your kitchen right now.

He built this accessory from "Iron Man" last Halloween using simple cardboard, copper tape, a few surface-mounted LEDs, an old cell phone battery, a trimmed down tuna for the housing, and some glue to hold it all together.

Impressively, the whole thing only took him five hours to build, which includes the time it took to lea how to work the LEDs. As you can see, it glows brightly undeeath a shirt and supposedly lasts for a few hours on full brightness.

He even uses it as a headlight for his bicycle when he's not fashioning other life-preserving power sources in his industrial complex.