Untitled

dabblet.css

.container {
	border: 2px solid black;
	text-align: justify;
	margin: 0;
	padding: 0;
	font-size: 0; /* magic! no space after :) */
}
.container:after {
	content: '';
	width: 100%;
	display: inline-block;
}
.content {
	width: 20%;
	display: inline-block;
	height: 100px;
	background-color: red;
	list-style: none;
	font-size: 2rem;
	text-align: center;
	line-height: 100px;
	color: white;
}

dabblet.html

<ul class="container">
<li class="content">Blah</li>
<li class="content">Bleh</li>
<li class="content">Blih</li></ul>

settings.json

{"view":"separate","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}