A fantastic purification device for travel is the SteriPEN Freedom, as reviewed on the Legendary Adventures of Anna – these kind of steripens use ultraviolet light to sterilize the water so that the bacteria are unable to multiply thus making the tap water safe to drink. You can use the SteriPEN Freedom for 45 seconds to sterilize up to half a liter of water.https://iwaterpurification.com/best-water-purification-tablets/

If water is unsafe, there will usually be a notice posted by the faucet in your room, and the hotel will provide complimentary bottles for you to drink from. Make sure you use these bottles to take your pills and brush your teeth too. https://iwaterpurification.com/best-insulated-water-bottle/

You can try the Sawyer Squeeze Water Filter System. It’s a 1 x 16 ounce soft bottle with a plastic syringe for cleaning, hydration system adapter, and a straw. You can drink directly from the Sawyer Squeeze but most people squeeze untreated water through it from a soft bottle to a clean container. The filter uses a hollow-fiber membrane filter that removes 99.99999% of all bacteria, such as salmonella, cholera and E.coli and removes 99.9999% of all protozoa, such as giardia and Cryptosporidium. The filter itself weighs 3 ounces. https://iwaterpurification.com/best-filtered-water-bottle/