Plastic test tubes with cork stoppers offer reliable closure and clear visibility. The corks provide a tight seal to prevent leakage and keep contents fresh, while the transparent tubes allow quick content assessment. Tall tubes deliver versatile use. They are suitable for plant propagation and growth experiments, and can also store candies or other small items. They can function as vials with corks for experiments or decorative displays. Cork-stopper closures enable secure sealing, making these tubes appropriate for laboratory, classroom, and decorative applications. The corks help minimize spills and preserve contents. Plastic test tubes with lids provide convenient access. The stoppers/lids make opening and closing easy, suitable for laboratory work, plant growth projects, and festive decorations, including plant test tubes. Use scenarios: - In the lab: store samples and run simple experiments with a clear view of contents. - In classrooms or at home: support seed propagation, plant growth studies, and hobby experiments. - For display or gifts: decorative arrangements, wedding or party favors, or candy/bead storage in clear tubes.