<div class="container">
  CSS SCROLL SNAP SLIDER - One Item Y axis - Haz scroll para probarlo!
  <div class="items">
    <div class="item">ITEM #1</div>
    <div class="item">ITEM #2</div>
    <div class="item">ITEM #3</div>
    <div class="item">ITEM #4</div>
    <div class="item">ITEM #5</div>
    <div class="item">ITEM #6</div>
  </div>
</div>

.container {
  width: 512px;
  height: 118px;
  text-align: center;
}

.items {
    width: 100%;
    height: 100%;
    scroll-snap-type: y mandatory;
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    flex: none;
  flex-direction: column;
    overflow: auto;
}

.item {
    width: 100%;
    height: 100%;
    display: inline-block;
    flex: none;
    scroll-snap-align: start;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-family: Arial;
  font-weight: bold;
  letter-spacing: 1.5px;
  border-radius: 8px;
  margin-bottom: 10px;
}

.item:nth-child(odd) {
  background-color: red;
}

.item:nth-child(even) {
  background-color: blue;
}