The Simplicity 2L Modular Dosing Container is designed to help you organize your solutions and keep your sump area tidy. The modular design allows you to connect multiple 2-liter units together to suit your dosing needs. The clear acrylic is marked with measurements in both milliliters and ounces, making it easy to check your remaining solution. The dosing container has lids that fit tightly into place and a tough ABS plastic nipple to ensure your tubing connection stays secure.