Cover image via Business Insider1. Hot chocolate
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2. Free alcohol
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As airlines charge passengers for everything from leg room to checked luggage, it's pleasantly surprising to know that a number of airlines actually serve free alcoholic beverages onboard and not just to first class passengers. However, it usually happens in long-haul and international flights. Here's a [list of airlines that serve free alcohol](http://maphappy.org/2012/07/wine-the-ultimate-list-of-airlines-that-serve-free-alcohol/).
3. Extra snacks
While most airlines offer a complimentary packet of peanuts or pretzels, if you want more, the flight attendant will give you an extra packet if there is enough for everyone. According to Smarter Travel, you may have better luck on late-night flights when many passengers pass on the snacks.
A smarter way to get the free stuff without annoying the cabin crew is to walk to the galley to ask for it after meal services are done.
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4. Basic first aid supplies
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All commercial airplanes have a first aid kit onboard. If you ask, the flight attendant will be happy to provide painkillers, antacids and bandages for minor wounds.
5. Reading material
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There are newspapers and magazines on the flight and they are free. You can simply grab the ones in the seat pocket or the ones on the shelves, no one will stop you.
6. The full can of soda
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You can ask the flight attendant for the entire can of soda rather than just a few drops over a mountain of ice. The flight attendant may oblige, or at least give you a refill.
It helps to be polite while asking for it.
7. Water bottle refills
You can have your water bottle refilled onboard so you can keep hydrated. However, it depends on how much water the aircraft has in supply. Long-haul flights usually have more water available for passengers.
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8. Sanitising wipes
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9. Baby diapers/baby kit
The more child-friendly airlines also offer free services for passengers travelling with babies. They will warm up your baby's bottle or food, and some will even provide free diapers, sanitary pads, baby wipes. Some of them also have box of milk.
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10. Souvenirs for kids
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11. Tea bags
You can ask for tea-bags and cabin crew would happily oblige. Afterall, it's free.
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12. Basic stationery items
Like writing notepads to airline writing pens, most flights are equipped with basic stationery items that passenger can request for from flight attendants.
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And if you're traveling business class, there's more…
13. Grooming kits
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14. Bedroom slippers and socks
Passengers in the Business Class can always request for slippers and socks to get comfortable. Again, it helps to be polite while asking.
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15. Moreover, don't be afraid to ask for an upgrade
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Airlines often offer upgrades to business or first class the day of your scheduled flight. There may not be any upgrades available, but it's worth a shot to ask the ground crew before you board. For a better chance, follow these steps:
Be very polite to all of the staff you are dealing with at the airline.
Dress like you are a first-class passenger. You don't have to go overboard by wearing a suit and tie, but do not wear tattered jeans, dirty shoes, a tee-shirt with obscene graphic on the front, or any other obviously "non-first-class" clothing.
Try to avoid flying during regular business hours (your typical 9am-5pm) as the first-class cabin is likely to be full on these flights.
16. Also, you can request for pillows and blankets during your flight. However, you're not supposed to bring them out of the cabin.
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