Durable Plastic Test Tubes with Wood Plug Closure

Each unit is a 9.5 cm tall, square-profile (2.5 × 2.5 cm) transparent test tube made from resilient hard plastic. Fitted with a precisely sized natural wooden plug, it delivers dependable containment for dry, liquid, or semi-moist materials. The combination of clarity, rigidity, and secure closure supports diverse low-risk applications—from school science tasks and kitchen ingredient portioning to propagating herbs and monitoring fermentation stages. Designed with home users in mind, this set balances utility, safety, and intuitive operation without unnecessary complexity or technical overhead.