Yes! An empty water bottle is allowed, and is a great way to save the expense of buying bottled water. Some airports even have water bottle “filling stations”.

When travelers (federal employees / grantees / contractors) use federal government funds to travel to/from a foreign country, the Fly America Act requires the use of a U.S. Flag carrier to the furthest possible point, unless an exception, as listed in the Federal Travel Regulation (FTR) is authorized. One of …

“Information coming out of Cuba about real on-the-ground experience with payment shows a very hit-or-miss situation. U.S. issued credit cards are rarely accepted outside of large, international chain hotels, and there are numerous instances where that is also problematic. Many U.S. credit card issuers have not yet taken the steps …