If you look inside the lid of this mug you can see what the white (removable) piece is holding in place. It's a tiny piece of plastic, about 1/8" wide and 1/6" tall. That's all. It's going to break for you, and after speaking to the company, you're out of luck. The replacement part costs HALF the total cost of the cup. Be prepared to invest more in this product than stated.
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