The sand in the water gravitated towards the bottom of the bottle.

海关官员拧开瓶盖，把瓶子放到鼻子底下。

youdao

To make it clearer to you, let us have a look at the bottom of the bottle.

为使它对您更清楚起见，我们来看看这瓶底。

youdao

A footpad to prevent rings on tables and protect the bottom of the bottle.

一个底垫，以防止放在桌子上底部的划伤，和保护的瓶子底部。

youdao

How to get the disgusting gunk out of the bottom of the bottle.

FORBES: Diary of a Mad Entrepreneur and His 6-Figure Kickstarter Launch

The twist-off lid is located at the bottom of the bottle, pointing in a downward orientation when positioned as intended.

ENGADGET

Smoking camel milk is apparently common in some countries and at the bottom of the bottle there are tiny dark particles, burnt wood from the smoking process.

BBC: NEWS | UK | Magazine | Milk: One hump or two?