.container {
  background-color: #eee;
  padding: 15px;
  height: 200px;
}

#floating-element {
   float: left;
   width: 150px;
   height: 80px;
   background: lightgreen;
   padding:5px;
   margin: 5px;
}

#current-element {
   border: 1px solid lightblue;
   padding: 5px;

   display: inline;
   clear: left; /** Not work with Inline, Inline-Block Element */
}