All first aid kits should contain some basic supplies. You will need a pair of disposable gloves in every kit so that whoever is treating the injured can avoid coming in contact with someone else's blood. You will also need plenty of band aids (in all different sizes) and sterile dressings for larger cuts and scrapes. There should also be scissors and adhesive tape in order to keep sterile bandages in place. You will also need cleaning supplies such as antibiotics, towelettes and ointment to prevent infections. Burn ointment is also a good idea to put in there first aid kit as well.

Although less common, eye wash solution should be present in case there is a need to flush out someones eye or use as a general decontamination. Many people also choose to put in over the counter medications such as aspirin, laxatives, and diarrhea medications.

If you are on prescription medications, you will also want to have those present in a first aid kit. If the medication could be susceptible to theft, it is best to only keep one dose in a first aid kit and check it regularly to make sure it is still there.

For vacations, you will want to add a variety of other products in order to have a safe time. If you plan to vacation in an area that has venomous snakes, you will want to include a snake bite kit. You will also want to have an extra bottle of sunscreen in your first aid kit in case you run out or lose your other bottles.

For sporting events, you will want to also have some extra sunscreen available in your first aid kit. But for rough sports, you will need to have available materials that will enable you to splint any broken bones and athletic wraps in order to wrap up knees of ankles. Athletic wraps can also be used to keep band aids in place when the injured wants to go back into the game. The wrap will keep the wound clean while the game is still going on.

If you want the convenience, you can always buy a pre-made first aid kit. What you will want to do is inventory it and make sure to add everything else that it is missing. This is the easiest way to get a basic kit and have the most basic supplies. If you feel that there isn't enough room to pack your supplies in it, you can get a bigger container to hold the first aid kit, or you can size it down by putting a lesser number of each supply. If you want smaller kits, make sure that you have one located in all of the most convenient places.