there have been no confirmed observations of giant planets or exoplanets where the diameter of droplets in storms reaches the size of a rim of a glass, bucket, container, or barrel. Storms on giant planets, such as Jupiter and Saturn in our solar system, are known to produce large-scale atmospheric disturbances, including prominent storms like the Great Red Spot on Jupiter. However, the size of the droplets within these storms is not known to be as large as the dimensions you mentioned.
It's important to note that our understanding of exoplanets is constantly evolving as new discoveries are made. Advanced observational techniques and future missions may provide us with more detailed information about the atmospheric conditions on exoplanets, including the sizes of droplets in their storms. Therefore, it is always possible that future observations could reveal the existence of such phenomena on other worlds.