Juicero might be an example, though I'm not sure if they made any specific large claim that was totally false, unlike in this case. Perhaps if explicitly Juicero claimed that some special magic was going on during the squeezing process, but I don't think they did

They claimed that you needed the large amounts of force from their machine to squeeze the juice from their packets. People found that you can open them up and squeeze the juice out by hand because the machine isn't actually doing any sort of fresh juice squeezing.