How does the insert prevent the liquid spilling?
Answer: By reducing the wave motion caused when the mug is shaken from side to side.
drinking affected by the insert?
Answer: Drinking is done normally.
should the insert be removed from the mug?
Answer: As often as necessary for cleaning.
will the insert last, and what happens afterwards?
Answer: Inserts can last indefinitely and replacement inserts can be purchased separately.
What is the insert made of?
Answer: A flexible plastic material designed for food and beverage applications.
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