Description: A battery-powered pump
Pitch: "Transfer gas, water and more without the mess"
Offer: $19.99 for one with free shipping
Bonus: 2nd one (just pay a separate fee)
Marketer: Ontel
Rank: No. 19*
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This project was originally tested in September of 2017 under the name "Pump Perfect." It was tested again (under this name) in March of 2018 for $39.99.
It seems the project has finally found its success formula.
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* DRMetrix Weekly Top 40, Short Form Week 18 (Source: AdSphere)