A small thing. It could have been nice if the scientists didn't have commercial bottled water on stage. As an example to the world. Reusable personal containers would have been nice.
Most scientist I know have a reusable water bottle on their desk. And a coffee cup. But it will likely have a cat or a joke of the "astronomers do it in the dark" flavour on it. Not something you typically want to show on TV. Also they traveled from their home institutes to the location of the press conference and got handed that plastic bottle by some well-meaning PR person.
For this event they could have purchased multiple use containers for each person. Wasteful but a better image. So not really their personal containers.
