questions like this make me want to cry
No a balloon carry lighter weight then a plastic bag.
They are changing so they can be lighter and smaller where we can carry/bring them places easier.
A very small amount in a sealed container is okay just not in your carry on
If your going onto a road trip, yes, but if you are going on a plane you can bring it with you but you cant bring it in your carry on but you can put it in the bag that will be under the plane.
Plastic is most of the time light to carry by itself, unless there is something in the plastic.
not in carry on baggage, but you can in checked baggage
When ants find big food the break it down in to small parts so its easier and lighter to carry
You can bring mascara in your carry on luggage. To be on the safe side, put it in your clear plastic bag of liquids. It's already under 3 oz., so it's carry-on ready.
Yes for the hair dryer, but the straightener ( if it is a cream or liquid) needs to be in a plastic bag and less than 3 oz. If you put it in checked bags there is no question, but you can carry it also in a carry on if you meet the requirements above.
Yes but no lighter
A couple of advantages of resin plastic water bottles include durability when compared to glass bottles. The plastic bottle can be recycled and then used over and over again. Also these bottles are lighter which makes them more convenient to carry around during the day.
From my experience, I was able to carry a Bic lighter with me in my check in baggage.