Mountain Dew Mouse
In response to a claim that a Mountain Dew drinker once found a mouse in their drink, a YouTuber decided to see if it were possible or not. So, they submerged a mouse in Mountain Dew for 30 days and sealed the container. Based on the amount of time it takes from packaging to sale, 30 days is a very reasonable time frame. As it turns out, there would be little left to signify that a mouse were ever there at all. This essentially refuted the claim. You can see the video below, but watch at your own risk.