Polycarbonate or anaerobic jars are the most commonly used containers. Other containers that can be used are made of steel, PVC, or glass. Caution must be exercised when using steel because it can rust in the presence of water. PVC containers are not optimal because they permit diffusion of water and oxygen.<ref name=Basan_etal_1988 /> Glass containers are excellent preservation containers, but they are difficult to use in the field without breaking. | Polycarbonate or anaerobic jars are the most commonly used containers. Other containers that can be used are made of steel, PVC, or glass. Caution must be exercised when using steel because it can rust in the presence of water. PVC containers are not optimal because they permit diffusion of water and oxygen.<ref name=Basan_etal_1988 /> Glass containers are excellent preservation containers, but they are difficult to use in the field without breaking. |