.container {
  max-width: 100%;
  clear: both;
  float: left;
  margin-bottom: 10px;
}

.item_wrapper {
  float: left;
  min-width: 270px;
  width: 50%;
  padding-right: 5px;

}
@media screen and (max-width: 600px) {
  .item_wrapper {
    width: 100%;
  }
}