While Pixy Stix may have gotten you all hopped up as a child, you’ll need something a bit stronger in your adult years. Enter Nixie Tubes — basically grown-up Pixy Stix laced with 100mg of caffeine.

The methods of caffeine ingestion range from typical (coffee) to X-TREEM (energy drinks) to sort of hardcore (5-Hour Energy), but none have been outwardly juvenile—until now. Each Nixie Tube packs ...