my first one cracked where the inner is such a poor design because it wedgesww itself quite readily against the outer. You also need to keep checking the filter itself is still in place as its quite a loose fit which means it wont be filtering (if bubbles come out side of filter instead of the middle) poking it means using fingers which aint exactly hygenic. It takes a bit of getting used to but  it is cheap and the company customer services is a hearty 10/10 so Im happy sticking with brita.