Details of 30ml square glass dropper bottles 1, Four colors in stock: clear, green, blue and matte black 2, Can be with 4 kinds of droppers - common screw plastic collar, metallic collar, child proof dropper and child proof & tamper evident droppper. 3, Round-end and Sharp end glass pipettes are available. 4, Beside droppers, the bottles can be used with sprayers, pumps, tamper evident sprayers, screw caps and so on. 5, More colors can be made if you want. 6, Any questions, please send inquiry to us.