(CNN) -- It's hard to keep track of what you can and cannot carry aboard flights.
It's no surprise that loaded weapons and explosives are strictly off-limits in airports and on planes, but the guidelines on some more common items might be less obvious to travelers.
In August, the Transportation Security Administration instituted a ban on gels, liquids and aerosols after British authorities said they uncovered a plot to blow up planes flying across the Atlantic Ocean. Federal authorities relaxed regulations the following month, allowing passengers to carry on some previously prohibited items.
Travelers can now carry travel-sized containers (3 ounces or less) of gels, liquids and aerosols as long as those items fit in a quart-sized, zip-top, clear plastic bag. Exceptions can be made for baby formula, breast milk, prescription medicines, over-the-counter medicines and other liquids or gels needed for medical reasons.
The following is a list of items passengers may and may not bring with them to the airport. (For details, visit the TSA site. 
)
Source: Transportation Security Administration
| Item |
Allowed in carry-on luggage? |
Allowed in checked luggage? |
 |
| Makeup and personal items |
| Aerosol sprays and cans |
Yes1 |
Yes |
| Baby formula, breast milk and other baby items |
Yes2 |
Yes |
| Beverages |
Yes3 |
Yes |
| Bubble bath (balls and liquid), bath oils |
Yes1 |
Yes |
| Canned or jarred goods |
Yes1 |
Yes |
| Cigar cutters |
Yes |
Yes |
| Corkscrews |
Yes |
Yes |
| Cosmetics |
Yes1 |
Yes |
| Creams, lotions |
Yes1 |
Yes |
| Eye drops, saline solution |
Yes4 |
Yes |
| Eyeglass repair tools |
Yes |
Yes |
| Eyelash curlers |
Yes |
Yes |
| Gel-filled bras and similar prosthetics |
Yes5 |
Yes |
| Gel-type candies |
No |
Yes |
| Gel shoe inserts |
No |
Yes |
| Hair gel |
Yes1 |
Yes |
| Hair straightener or detangler |
Yes1 |
Yes |
| Insect repellent |
Yes1 |
Yes |
| Knitting and crochet needles |
Yes |
Yes |
| Lip gel, lip balm, lip gloss |
Yes1 |
Yes |
| Liquid sanitizers and soaps |
Yes1 |
Yes |
| Medication (liquid or gel) |
Yes4 |
Yes |
| Mouthwash |
Yes1 |
Yes |
| Nail clippers, nail files, cuticle cutters |
Yes |
Yes |
| Nail polish, removers |
Yes1 |
Yes |
| Perfume, cologne |
Yes1 |
Yes |
| Personal lubricants |
Yes4 |
Yes |
| Pudding, Jell-O, whipped cream, yogurt and other gel-like food substances |
Yes1 |
Yes |
| Safety razors |
Yes |
Yes |
| Scissors (metal-pointed tips, cutting edge 4 inches or less) |
Yes |
Yes |
| Scissors (plastic or metal with blunted tips) |
Yes |
Yes |
| Shampoo, conditioner |
Yes1 |
Yes |
| Toothpaste |
Yes1 |
Yes |
| Toy weapons (if not realistic replicas) |
Yes |
Yes |
| Tweezers |
Yes |
Yes |
| Umbrellas |
Yes6 |
Yes |
| Walking canes |
Yes6 |
Yes |
| Sharp objects |
| Box cutters, ice axes/ice picks, knives (not including plastic knives or butter knives), meat cleavers, razor-type blades, sabers, swords |
No |
Yes7 |
| Sporting goods |
| Baseball bats, bows and arrows, cricket bats, golf clubs, hockey sticks, lacrosse sticks, pool cues, ski poles, spear guns |
No |
Yes |
| Guns and firearms |
| Ammunition |
No |
Yes8 |
| BB guns, compressed air guns, firearms, parts of guns and firearms, pellet guns, flare guns, realistic replicas of firearms, starter pistols |
No |
Yes9 |
| Flares |
No |
No |
| Gun lighters, including black powder and percussion caps |
No |
Yes |
| Gunpowder |
No |
No |
| Tools |
| Axes and hatchets, cattle prods, crowbars, hammers, drills and saws (including cordless portable power drills and saws), drill bits |
No |
Yes7 |
| Screwdrivers, wrenches, pliers and other tools less than 7 inches long |
Yes |
Yes7 |
| Tools longer than 7 inches |
No |
Yes7 |
| Martial arts/self-defense items |
| Billy clubs, blackjacks, brass knuckles, kubotans, nightsticks, nunchakus, throwing stars |
No |
Yes |
| Mace/pepper spray |
No10 |
Yes10 |
| Stun guns/shocking devices |
No |
Yes |
| Explosive materials |
| Blasting caps, dynamite, fireworks, flares (in any form), hand grenades, plastic explosives, realistic replicas of explosives |
No |
No |
| Flammable items |
| Aerosols that aren't for personal care |
No |
No |
| Fuels (including cooking fuels and any flammable liquid fuel), gasoline, gas torches, lighter fluid, turpentine and paint thinner |
No |
No |
| Lighters |
No11 |
No11 |
| Safety matches |
Yes12 |
No12 |
| Strike-anywhere matches |
No12 |
No12 |
| Realistic replicas of incendiaries |
No |
No |
| Flammable paint |
No |
No |
| Nonflammable paint |
Yes1 |
Yes |
| Disabling chemicals and other dangerous items |
| Chlorine for pools and spas, liquid bleach, spray paint, tear gas, compressed gas cylinders (including fire extinguishers) |
No |
No |
| Spillable batteries (except those in wheelchairs) |
No |
No |
| Medication and special needs devices |
| All medical and special needs devices are allowed as long as they are properly marked with a professionally printed label identifying the manufacturer's name and inspected to ensure prohibited items are not concealed. |
Yes |
Yes |
| Electronic devices |
| All electronic devices are allowed, but check with your airline or travel agent for restrictions on their use during flight. |
Yes |
Yes |
1Travel-size toiletries and other personal items must be in containers that are 3 ounces or less and fit comfortably in a quart-size, zip-top clear plastic bag.
2Baby formula, breast milk and other baby items are allowed for passengers traveling with a baby or toddler. All items will be inspected.
3Travelers can bring beverages and other items on board if purchased in the secure boarding area. All other beverages are allowed only if they are in a travel-size container (3 ounces or less) and put in a quart-size, zip-top clear plastic bag for inspection.
4Travelers are allowed to carry eye drops, medications (liquid or gel), personal lubricants and saline solution in containers that are 3 ounces or less and stored in a quart-size, zip-top clear plastic bag. Larger containers will be permitted after they are declared to security officers and cleared through further inspection.
For prescription medicine, the name on the medicine must match the traveler's ticket.
5 Gel-filled bras may be worn through security screening and aboard the plane.
6 Umbrellas and walking canes will be allowed as carry-ons after they have been inspected to ensure prohibited items are not concealed.
7 Any sharp objects in checked baggage should be sheathed and securely wrapped to prevent injury to baggage handlers and inspectors.
8 Travelers should check with their airline or travel agent to see whether ammunition is permitted. If so, it must be declared at check-in.
Small-arms ammunition must be securely packed in fiber, wood or metal boxes or other packaging designed to carry small amounts of ammunition.
9 Firearms must be unloaded; packed in a locked, hard-sided container; and declared at check-in.
10 One 118-millimeter or 4-fluid-ounce container of Mace or pepper spray is permitted in checked baggage provided it is equipped with a safety mechanism to prevent accidental discharge.
11 All lighters are prohibited as carry-on items. Lighters without fuel are permitted in checked baggage. Lighters with fuel are prohibited in checked baggage unless they adhere to the DOT exemption, which allows up to two fueled lighters if properly enclosed in a DOT-approved case. If travelers are uncertain as to whether their lighter is prohibited, they are asked to refrain from bringing it to the airport.
12 Up to four books of safety matches (nonstrike-anywhere) are permitted as carry-on items. All matches are prohibited in checked baggage.
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