My Manna tumbler was a Christmas gift almost 2 years ago. The outer cover of the lid, metal came unglued an I had epoxied back on, but though the plastic was durable by itself. It wasn't and the plastic got broken, so I got 2 lids recently. If the 2 pieces separate on either of the new lids, I will also seal around the straw hole to prevent leakage at the outer edges. I realize nothing is perfect, so I AM glad to keep using your tumbler. It is absolutely my favorite drinking container!