<div class="container">
  <div class="content">content</div>
  <div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque eu velit vel augue tempus fringilla.</div>
  <div class="content">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque eu velit vel augue tempus fringilla. Vivamus vulputate luctus dui, eget luctus enim molestie luctus.</div>
</div>

.container {
  border: 3px solid #ccc;
  padding: 10px;
  width: 20em;
  
}

.content{
  width: -moz-fit-content;
  width: fit-content;
  background-color: #8ca0ff;
  padding: 5px;
  margin-bottom: 1em;
}