How to push a block to the bottom of another block without flexbox?

Question

css

How to push a block to the bottom of another block without using flexbox?
Attached is a visual example.

Answer 1

via absolute

.parent {
    position: relative;
}

.block {
   position: absolute;
   bottom: 0px;
   left: 0px;
   right: 0px;
}

Answer 2

<div class="container" style="min-height: 250px;">
    <span>container</span>
    <div style="position: absolute; bottom: 0;">
        <div class="block1">block1</div>
        <div class="block2">block2</div>
   </div>
</div>