Is it safe to drink the tap water?

No. Stick to bottled water, which is available at every 7-Eleven.

Should I tip for taxi rides?

Tipping is not expected. Rounding up to the nearest 10 or 20 THB is appreciated if the driver was helpful.

Bangkok: A First-Timer’s Survival Guide

Navigate Bangkok by combining the BTS Skytrain and MRT subway to beat traffic, using apps like Grab or Bolt for taxis, and relying on river boats for riverside temples. Avoid tuk-tuks for long distances and always insist on the meter when taking a standard taxi.

Get a Rabbit Card. Upon arrival, purchase a Rabbit Card at any BTS Skytrain station. This rechargable card saves you from standing in ticket machine lines for every single ride.
Use Ride-Hailing Apps. Download Grab or Bolt before you arrive. Use these to hail cars; they provide a fixed price upfront and eliminate the need to negotiate fares or explain destinations in Thai.
Master the Chao Phraya River. Use the orange-flag public river boats to get between major tourist sites like Wat Pho and the Grand Palace. It costs roughly 16-30 THB, which is significantly cheaper and faster than a taxi during rush hour.
Identify Official Taxis. If you must flag a taxi on the street, look for the 'Taxi Meter' sign on the roof. If the driver refuses to use the meter, close the door and wait for the next one.

Is it safe to drink the tap water?: No. Stick to bottled water, which is available at every 7-Eleven.
Should I tip for taxi rides?: Tipping is not expected. Rounding up to the nearest 10 or 20 THB is appreciated if the driver was helpful.