Test tube/reservoir cap

Test tube/reservoir caps are single-use seals designed to secure the opening of laboratory containers like test tubes or reagent reservoirs. Their primary clinical purpose is to prevent contamination, spillage, or evaporation of contents during handling, storage, or transport, while some models allow controlled access for sampling or dispensing.

These devices are typically classified as single-use and regulated under general medical device standards, with compliance requirements varying by jurisdiction. They are commonly supplied in bulk packs or sterile sets, often as part of laboratory consumables or sample handling kits, and may require adherence to sterility and material safety specifications.