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10 Products That Come to Life When You Add Water

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Vat19 turns its cameras on ten toys, snacks, and gadgets that only work once water enters the picture.

The St. Louis novelty retailer’s latest roundup video, “10 Products That Come to Life When You Add Water,” runs just under 20 minutes and uses the launch of its Sour Powdered Chewing Gum as the excuse to dig through the rest of its water-dependent catalog. The gum itself is the gimmick: a sour powder that turns into actual chewable gum the moment it mixes with saliva in your mouth. From there, the hosts move outdoors and underwater to run through gear that either needs water to function or gets a lot more interesting once it’s added.

• The video is built around promoting Vat19’s Sour Powdered Chewing Gum, also sold as Sour Sneaky Stardust Powdered Chewing Gum, which converts from powder to gum using only saliva and water.
• The Watermelon Ball, a neutrally buoyant ball made for pool games like underwater football and rugby, and the LifeStraw, a personal water filter that strips bacteria and parasites from natural water sources on contact, headline the lineup.
• The rest of the roundup includes reusable water-absorbing water bombs, the Stratolauncher IV water-powered rocket launcher, and the Makey Makey circuit kit, which can turn a cup of water into a working touchpoint in an electrical circuit.

The Gum That Needs Spit To Work

Vat19’s Sour Powdered Chewing Gum is the reason the video exists in the first place. Poured straight from the package, it’s just sour powder — no gum in sight. Once it hits the mouth and mixes with saliva, the powder binds together into a real, chewable stick of gum, sour on contact and mellowing out the longer you chew it. It’s the kind of built-in reveal that Vat19 has built its entire channel around: watch the product transform in real time, then buy it.

Underwater Football With The Watermelon Ball

The Watermelon Ball is exactly what it sounds like — a ball engineered to be neutrally buoyant so it neither floats to the surface nor sinks to the bottom of a pool. That makes it playable underwater in a way a normal ball isn’t, and the hosts use it to run informal games of underwater football and rugby, diving and passing without the ball drifting off in either direction. It’s one of the more physical demos in the video, requiring an actual pool rather than a sink or a bucket.

The LifeStraw’s Real-World Purpose

Not everything in the roundup is a toy. The LifeStraw is a portable water filter shaped like an oversized drinking straw, built to pull bacteria and parasites out of natural water sources — lakes, streams, ponds — as you drink directly through it. It’s a legitimate survival and outdoor product that Vat19 sells alongside its novelty gear, and the video treats it with more straightforward respect than the gag items, framing it as something genuinely useful on a camping trip or in an emergency.

Pour it out, it’s just sour powder. Chew it, and saliva and water turn it into real gum — that’s the entire pitch.

Water Bombs, A Rocket Launcher, And A Circuit Kit

The rest of the lineup leans back into backyard chaos. Reusable water-absorbing water bombs replace disposable water balloons with soft, spongy balls that soak up water and can be thrown over and over without the cleanup. The Stratolauncher IV uses water pressure to fire foam rockets into the air, turning a garden hose into launch fuel. And the Makey Makey kit, normally used to turn bananas or Play-Doh into game controllers, gets repurposed here with cups of water standing in as conductive touchpoints for an improvised circuit — a small science-class trick dressed up as a party gag.

Vat19’s whole channel runs on this format — take a product line, string ten of them together around a theme, and let the hosts sell the reveal instead of a script. This one just happens to need a hose, a pool, and a sink to pull off, and the Sour Powdered Chewing Gum riding along as the product it’s actually there to move.