The People's Operator has a US based customer service team. They are positioned as a carrier who is socially conscious and they will donate 10% of your monthly bill to a charity of your choice. You don't need to do anything, TPO will take care of it all for you.
Seashells contain calcium carbonate. The calcium carbonate reacts with the acid in the vinegar and causes carbon dioxide bubbles to form. Even though the acid in vinegar is weak it can, over a period of time, dissolve shells.
Snail shells are made of this. Yesterday, an inquisitive mind prowling the Internet using the search string what are land snail shells made of ended up on this blog. I don't think that question was specifically addressed on this blog before. Therefore, we must answer it now. Land snail shells are made of calcium carbonate. Well, that's the quick and simple answer. In reality, however, nothing that evolution has ever created can be explained away so simplistically. And snail shells are no exception. So, here is a slightly more detailed answer.