This is a test tube for ant keeping. The interior is coated with gypsum for the substrate, making it suitable for raising initial colonies and small-scale ant keeping. • Test tube size: 15mm diameter • Gypsum installed (structure that easily retains humidity) • Water can be supplied by removing the rear cap • The water supply area and the living area are separated, designed to prevent water leakage • Easy to observe and manage • For keeping ants (queen ants and small colonies) • For initial rearing and observation • Recommended for the stage before transitioning from test tube rearing to a nest • Living organisms are not included • Due to being handmade, there may be individual differences in the gypsum finish • Please refrain from purchasing if you are overly concerned about minor imperfections We will carefully pack and ship with cushioning material.