These items are often called single use or throwaway cameras because you can only use them once before throwing them away. They are basically small, light, box-type cameras that come with a roll of film inside. Some models have a built in flash and some have an auto focusing system.
Disposable cameras come with various speeds of film, however 400 ISO is the most popular. They also come with assorted numbers of exposure. When you are finished taking your photos, you just hand the camera in to get the film developed. Some cameras are recycled and used again. They are ideal for day trips, holidays and occasions such as weddings. Some disposable digital models are now on the market. Disposable film cameras can be bought for less than $10.