The Test Tube Stopper is a simple and reliable solution for keeping test tube ant colonies safe, secure, and stationary. Designed specifically for Esthetic Ants 16 x 150 mm test tubes, these stoppers provide a snug and escape-resistant fit.

The unique hexagonal outer shape prevents test tubes from rolling, making them ideal for both storage and active setups. Each stopper includes a vented insert that allows proper airflow while keeping your ants safely contained.

This product is supplied as a set of 10 pieces and is not compatible with test tubes from other brands or different sizes.

Originally designed by Antheap and adapted by Daniel Onneweer for Esthetic Ants, these stoppers combine practical design with long-term durability.