Durable plastic test tube bottles with tight sealing lids protect contents from leakage and contamination. Compatible with storage tubes with lids and with plastic tube beads for organized storage. Made from safe plastic, these bottles are suitable for use as plastic tester tubes and plastic test tubes, offering reliable performance in lab and educational settings. The transparent, clear design enables quick visual inspection of contents, while the tubes are versatile for multiple uses. They function well as tube containers for samples, reagents, or small items. Protective sealing with caps provides secure, longlasting storage and easy transport, making them suitable for tube storage in various environments. 23 practical use scenarios: Laboratory sample storage and transport: store small samples or reagents securely, with easy visibility of contents. Classroom and teaching activities: organize and hold liquids, powders, or small components during experiments and demonstrations. Hobby, craft, or field use: keep beads, seeds, powders, or tiny parts neatly contained and portable.