Bought this on May 3rd.  Today is June 10th and I already have to replace the little rubber overpressure plug in the lid.  It simply does not fit tight enough to hold in any pressure. I'm not sure if I rec'd a defective one (since it's so new) or if they just wear out every month. I'm really not happy about this at all.  I'm hoping I hear from Presto about this.