Is there a single correct preposition which should be used before "the bottom of", similar to "at the end of" (AFAIK "in the end" is only used by itself), or does it depend on the noun used after it? I used to think that "at the bottom of" was the only correct option, but recently an American told me that "in the bottom" is also correct when the position is inside a container. Examples:
- at/in the bottom of the sea (I always thought "in the bottom of the sea" was wrong, but today I found this children's song: https://redgrammer.com/index.php/theres-a-hole-in-the-bottom-of-the-sea-song.html)
- at the bottom of the page
- at/in the bottom of the cupboard/drawer/fridge/pocket
Is that correct? Also, is "on the bottom of" ever used?