What type of container is designed with a permanently attached lid and small openings for access?

The type of container specifically designed with a permanently attached lid and small openings for access is a closed-head drum. Closed-head drums are commonly used for storing and shipping hazardous materials, chemicals, or liquids. Their design includes a sealed structure that minimizes the risk of spillage and exposure, making them suitable for many industrial and hazardous substances. The small openings, often referred to as bungs, allow for filling or dispensing contents without removing the entire lid, providing safety and containment features.

In contrast, carboys are large containers typically made of glass or plastic with a narrow neck, which are more suited for liquids but do not have a permanently attached lid in the same way. Cylinders are usually used for gases and have a different design prioritizing pressure containment rather than a permanently sealed lid. Dewar containers are specialized vessels designed to hold cryogenic materials and maintain low temperatures, and while they have lids, they are not classified as having a permanently attached lid with access openings like closed-head drums.