Can I kasher the microwave in my hotel room?

Can I drink plain coffee that is served on an airplane?

If a hotel is serving 100% orange juice or apple juice, is it ok to drink, or does it need a reliable hechsher?

If I'm eating my personal kosher food in the hotel's dining room area by a breakfast, is that considered Maaras Ayin?

What do I need to know about ordering kosher meals on an airplane?