Flying and zero waste in the same sentence is kind of an oxymoron. However, that doesn’t mean we can’t take strides to make it less wasteful. Remember, it’s not about perfection; it’s about making better choices, and I will echo it again and again.
An item to bring is an EMPTY water bottle. Security won't let you bring a full water bottle through security so be sure that it's empty. There will be plenty of water fountains to fill it up after you're done with the security check.