You should be able to bring tennis bags on most airlines, but you have to be careful about the size. Most airlines specify size limits that are a sum of the length, width and height of the bag. If your bag is 25" long, 12" high and 10" wide, that's a total of 47 inches. If the airline had a limit, this bag would have to be checked. You probably won't be able to carry on a 12 or 15 pack bag, but 6 packs should be OK. Always check with your airline and have a backup plan if they check your bag.
You can definitely take a harmonica along with you.
Yes, it is not an illegal or dangerous weapon.
Yes, you can take toothpaste on an airplane as long as it is in a container that is 3.4 ounces or less and fits in a quart-sized plastic bag for security screening.
A duffle bag is the best for tennis players.
A duffel bag will fit under the seat on an airplane.
Check with the airlines as to what they allow you to carry on.
If it is in a plastic zipped up bag in your suitcase-yes Otherwise-don't know
yes.
Yes, you can bring a toiletry bag on an airplane as long as it complies with the airline's regulations for carry-on luggage.
Yes two bic style lighters are allowed on your person or in your carry on bag.
Yes yhu can. Yhu don't have to have it in a bag or anything... Although most people would haha! Anyway yes yhu can bring pads on an airplane...
Yes, you can bring regular-sized toothpaste on an airplane in your carry-on bag as long as it is in a container that is 3.4 ounces (100 milliliters) or less and all containers fit in a clear, quart-sized plastic bag.