When we were free-dropping in Ethiopia the pallets were triple bagged and shrink wrapped. We dropped (ME) from about 10 (ten) feet RADALT (I called the heights) with 50% flap and gear down to minimise the impact.
That water packaging doesn't look too robust to me, but difficult to judge. The impact looks like it was into some soft(ish) material (sand?), but not sure what the supplies 'survival' rate would be. Judging by the aircraft's shadow, they are not THAT low.
But the cynic in me says the political gesture has been made in front of the world's press.