<div class="container visible">
  <div class="note">My <code>overlow-y</code> is <code>visible</code>.</div>
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Magnam fuga odio sequi delectus rem? Tempora accusantium pariatur quaerat repudiandae explicabo laudantium itaque sapiente delectus labore eaque dicta consectetur dignissimos corporis!
</div>
<div class="container hidden">
  <div class="note">My <code>overlow-y</code> is <code>hidden</code>.</div>
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Itaque qui consectetur quaerat quo hic quidem illum ipsum dolore modi. Numquam repellat cum iure quisquam veniam praesentium rerum nobis voluptatem tempore.
</div>
<div class="container scroll">
  <div class="note">My <code>overlow-y</code> is <code>scroll</code>.</div>
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Odit labore laudantium nisi aliquid nulla qui quisquam recusandae quis corporis expedita ipsum debitis mollitia ducimus ex enim deleniti rerum quos. Tempora.
</div>
<div class="container auto">
  <div class="note">My <code>overlow-y</code> is <code>auto</code>.</div>
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Animi minus voluptate mollitia optio maiores harum expedita numquam accusantium ut eligendi rem cupiditate illum aspernatur doloremque possimus vitae voluptates officia quo!
</div>
body {
  background-color: #F5F5F5;
  color: #555;
  font-size: 1.1em;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.note {
  max-width: 500px;
  margin-bottom: 10px;
  font-weight: bold;
  color: red;
}

.container {
  width: 250px;
  height: 150px;
  padding: 15px;
  border: 1px solid grey;
  float: left;
  margin: 1em;
  background-color: white;
}

.hidden {
  overflow-y: hidden;
}

.scroll {
  overflow-y: scroll;
}

.auto {
  overflow-y: auto;
}

img {
  width: 300px;
  height: 250px;
}