Here is a pure CSS experimental work to create floating bubbles without using JavaScript. These animated bubbles are also with popping effect. All these animation is created by Pure CSS.
Demo: http://demo.web3designs.com/animated-bubble-upwards-continuously-with-pure-css.htm
Download Links
http://www.css-jquery-design.com/2014/07/animated-bubbles-upwards-continuously-with-pure-css/
