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  • Dropping this bath bomb into your tub

  • turns all the water in your bathtub black.

  • But how big would the bomb need to be

  • to black out an entire swimming pool?

  • Let's try 2,000 pounds.

  • So to make our large molds, we're

  • going back to our old friend, fiberglass,

  • which we used to make the bowl from our marshmallows video.

  • We're going to make two halves that'll

  • come apart and hopefully reveal a giant bath bomb.

  • This epoxy just soaks into the fiberglass

  • and makes everything rock solid.

  • Ta-da!

  • Right behind me, there, is 31 50-pound bags of materials.

  • The recipe is one part cornstarch, one part citric

  • acid, to two parts baking soda.

  • And then we add the dye to turn it black.

  • That's your regular bath bomb.

  • We're making one a tad bit bigger.

  • Once we get this first batch done,

  • there's, like, seven or eight more to go.

  • So that's good.

  • Not bad for a day's work, right?

  • I'm putting this in the sun to bake.

  • I've got to dry this sucker out.

  • I'm so glad I started rolling.

  • Did you drop it in there?

  • I got this, guys.

  • We're done!

  • We've completed the bath bomb.

  • Now we wait till tomorrow and we try to figure out

  • how to get it out of the mold.

  • We're going to cut all of the shell off and all the support.

  • We're going to kind of tip the back end

  • and let the whole thing roll into the pool.

  • Ah.

  • That's one big bath bomb, y'all.

  • [SCREAMING]

  • That was crazy.

  • Look how green it looks.

  • Get your own black bath bomb and see hundreds of other gifts

  • we've discovered at Vat19.com.

  • Hey, if you guys want to see a little bit more

  • about how we put this whole thing together,

  • head on over to Vat19.com, where we have exclusive

  • behind the scenes footage.

  • Do you guys think this counts as my bath for the day?

  • Yeah, you're swimming, man.

  • Yeah.

  • Yeah.

  • Vat19.com.

Dropping this bath bomb into your tub

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