A tiny chip for containers

container-chip.css

.container {
  outline: 1px solid hotpink;

  &::before {
    z-index: 1000;
    content: 'container';
    position: absolute;
    top: 0;
    left: 0;
    font-size: 14px;
    line-height: 1;
    padding: 4px;
    color: white;
    background: hotpink;
  }
}