JSFiddle - React, Tailwind, and code Playground

HTML

<div id="background" class="background">
  <div id="bottle" class="bottle">
    <img src="http://www.jarsandbottles-store.co.uk/media/catalog/product/cache/1/image/500x500/9df78eab33525d08d6e5fb8d27136e95/5/0/500ml-sloe-gin-glass-bottles_1.jpg">
  </div>
</div>

JavaScript

var bottleheight = document.getElementById('bottle').offsetHeight;
var bottlewidth = document.getElementById('bottle').offsetWidth;
var background = document.getElementById('background');
document.getElementById('background').style.backgroundPosition = "-" + bottleheight + "px";