Reusable 6-liter (1.5gallon) brown bottle. The bottles are 14" from end to end, and 6.25" in diameter with a 38mm (Standard 3-liter bottle) finish. Depending on what is put in them and how they are cleaned to how long they will last. We estimate around 8-10 refills for the average user. Screw on lids are sold separately, and you can find these in the 'Like Items' listed below.