Super bottle and absolutely tight! One must fill in no way a carbonated beverage, then it was the with the Dichtsein but with water or juice without bubble is the perfect bottle. I also like to drink it. We now have four bottles in the home and no more about them. The cleaning in the dishwasher is a breeze and everything through the large opening is also nice and clean. The only drawback: My little boy (3.5) does not yet manages to shut the bottle alone. The closure is really hard. Still highly recommended!