html - Aligning to the bottom in flexbox

Question

I'm have containers that should change height dynamically depending on the content. For all containers in a given row, the bottom text should all be fixed to the bottom regardless of content in each one's container.

.flex-list {
  display: flex;
  flex-direction: column;
}
.flex-list .flex-row {
  display: flex;
  margin-bottom: 20px;
}
.flex-list .flex-row .flex-item-wrapper {
  margin-right: 20px;
  width: 100%;
  background-color: yellow;
}
.flex-list .flex-row .flex-item-wrapper:last-child {
  margin-right: 0px;
  background-color: transparent;
}
.flex-list .flex-row .flex-item-wrapper .flex-item {
  width: 100%;
  height: 100%;
}
.flex-item-stats {
  display: flex;
  justify-content: space-between;
  color: grey;
  padding-top: 10px;
}
.flex-item-stats > * {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.caption {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

<div class="profile-content flex-list">
  <div class="flex-row">
    <div class="flex-item-wrapper">
      <div class="flex-item thumbnail clickable" data-href="#">
        <img class="img-circle" src="http://blog.blogcatalog.com/wp-content/uploads/mario-300x300.jpg" style="width:150px">
        <div class="caption">
          <h4>
                <a href="#">Y-find</a>
              </h4>
          <div class="flex-item-stats">
            <small>left</small>
            <small>right</small>
          </div>
        </div>
      </div>
    </div>
    <div class="flex-item-wrapper">
      <div class="flex-item thumbnail clickable" data-href="#">
        <img class="img-circle" src="http://blog.blogcatalog.com/wp-content/uploads/mario-300x300.jpg" style="width:150px">
        <div class="caption">
          <h4>
                <a href="#">Cardguard Namfix</a>
              </h4>
          <div class="flex-item-stats">
            <small>left</small>
            <small>right</small>
          </div>
        </div>
      </div>
    </div>
    <div class="flex-item-wrapper">
      <div class="flex-item thumbnail clickable" data-href="#">
        <img class="img-circle" src="http://blog.blogcatalog.com/wp-content/uploads/mario-300x300.jpg" style="width:150px">
        <div class="caption">
          <h4>
                <a href="#">Voyatouch Voyatouch Voyatouch Voyatouch Voyatouch Voyatouch </a>
              </h4>
          <div class="flex-item-stats">
            <small>left</small>
            <small>right</small>
          </div>
        </div>
      </div>
    </div>
    <div class="flex-item-wrapper">
    </div>
  </div>

</div>

Answer 1

You need to make the parent a flex container:

.flex-list .flex-row .flex-item-wrapper .flex-item {
    width: 100%;
    height: 100%;
    display: flex;                      /* new */
    flex-direction: column;             /* new */
}

Then, tell the .caption element to fill available height:

.caption { flex: 1; }

Revised Fiddle

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