Can I bring it on a plane?

Any knife except plastic or round-bladed butter knives must go in checked bags. Sheathe or wrap the blade. TSA source

Plastic and round-bladed butter knives are the one kind of knife allowed in carry-on. TSA source

Any blade means checked bag only. Wrap it so it can't hurt bag handlers. TSA source

A blade of any length means it goes in checked bags. TSA source

Allowed in carry-on with no blade. Built-in scissors must be under 4 inches. TSA source

Carry-on only if the blades are under 4 inches (10 cm) from the pivot point. Longer scissors go in checked bags. TSA source

Checked bags only, with or without the blade. TSA source

The handle can go in carry-on without the blade. Loose blades go in checked bags. TSA source

Loose blades aren't allowed in carry-on. Blades sealed in a cartridge are fine. TSA source

Disposable and cartridge razors are fine in both. TSA source

Allowed in both. TSA source

Allowed in both. Cover sharp tips in checked bags. TSA source

Allowed in both. TSA source

Allowed in both. TSA source

The small foil blade means checked bags only. TSA source

Allowed in both. Circular thread cutters with blades go in checked bags. TSA source

Allowed in both. Thread cutters with blades go in checked bags; scissors under 4 inches can stay in carry-on. TSA source

Allowed in both. TSA source

Carry-on only. Many airlines now allow two at most, and some just one. TSA source

101–160 Wh: carry-on only, with airline approval, two at most. TSA source

Corded hair tools are fine in both. TSA source

Carry-on only. Spare gas cartridges aren't allowed at all. TSA source

Tools 7 inches (18 cm) or shorter, measured end to end, are allowed in carry-on. TSA source

Over 7 inches goes in checked bags. TSA source

Carry-on only if 7 inches (18 cm) or shorter. Longer ones go in checked bags. TSA source

Checked bags only. TSA source

Checked bags only, including drill bits. Spare lithium batteries for them must go in carry-on. TSA source

One ordinary lighter is fine in carry-on. In checked bags only if empty, or up to two in a DOT-approved case. TSA source

Torch lighters burn hotter and are banned from both. TSA source

Carry-on only, protected from switching on (case, locked button or battery out). TSA source

One book of safety matches in carry-on. No matches in checked bags. TSA source

Not allowed in either. TSA source

Carry-on only, protected from switching on. Lithium batteries up to 100 Wh. Airlines may limit how many. TSA source

Solid wax candles are fine in both. TSA source

Gel-type candles go in checked bags. TSA source

Carry-on only if it holds less than 3.4 oz of liquid and fits in your liquids bag. Bigger ones go in checked bags. TSA source

Allowed without water. Customs may restrict plants on international flights. TSA source

Use a container the X-ray can see through: officers won't open it, and an opaque one won't be allowed. Some airlines don't allow ashes in checked bags. TSA source

Allowed in carry-on. Check your airline for size limits. TSA source

Carry-on: 3.4 oz (100 ml) or less, in your liquids bag. Checked: up to 500 ml per can, 2 L total, with the cap on. TSA source

Carry-on: 3.4 oz (100 ml) or less. Checked: allowed with the nozzle capped. TSA source

3.4 oz (100 ml) or less in carry-on, in your liquids bag. Bigger bottles in checked bags. Stick sunscreen isn't a liquid. TSA source

Stick deodorant isn't limited. Gel and spray deodorant follow the 3.4 oz liquids rule. TSA source

3.4 oz (100 ml) per container, all in one quart-size bag. Bigger sizes go in checked bags. TSA source

Carry-on: only minis of 3.4 oz (100 ml) in your liquids bag. Checked: no limit on amount. TSA source

Carry-on: 3.4 oz minis in your liquids bag. Checked: up to 5 liters per person, in unopened retail packaging. TSA source

Not allowed in either. TSA source

Solid food is fine in both. Officers may ask you to take it out for screening. Customs rules apply on international flights. TSA source

Solid cheese is fine in both. TSA source

Creamy cheese over 3.4 oz (100 ml) goes in checked bags. TSA source

Spreads count as liquids: 3.4 oz (100 ml) or less in carry-on, bigger jars in checked bags. TSA source

Allowed if any ice around it is frozen solid when screened. TSA source

Must be frozen solid at security. Melted or slushy gel packs follow the 3.4 oz liquids rule. TSA source

Allowed, but containers over 12 oz (350 ml) go in a separate bin and may be opened. TSA suggests checking big tubs. TSA source

More than 3.4 oz is allowed in carry-on, outside the liquids bag. Tell the officer at the start of screening. Your child doesn't have to be with you. TSA source

Allowed. Declare them and put them in a separate bin. Unused syringes need the matching medication. TSA source

Medically necessary liquids over 3.4 oz are allowed in carry-on. Declare them at the start of screening. TSA source

Checked bags only. TSA source

Clubs and other gear that could be used as a bludgeon go in checked bags. TSA source

Checked bags only. TSA source

Blunt-tipped poles can go in carry-on. Sharp-tipped poles go in checked bags. TSA source

Blunt-tipped walking sticks are fine. Medical canes have their own screening process. TSA source

Checked bags only. TSA source

Usually allowed in carry-on, at the officer's discretion. Check your airline's size limits. TSA source

Allowed if it fits your airline's carry-on size. Large hooks go in checked bags, sheathed. TSA source

Checked bags only. TSA source

Not allowed in either. TSA source

Checked only: one container up to 4 fl oz (118 ml) with a safety lock, and no more than 2% tear gas. Some airlines ban it entirely. TSA source