I keep several Fox 40's (with mouthguard) in rotation.
I soak them regularly in mouthwash (yum) and have never bit through one yet.
I don't care for the ones without the mouthguard personally, and the only time I use one without a rubber tip is when my pink whistle comes into play.
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There was the person who sent ten puns to friends, with the hope that at least one of the puns would make them laugh. No pun in ten did.
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