If the rubber sheath gets ripped or torn for any reason and you don't need to replace the whole mouthpiece, the replacement bite valve sheaths are a perfect solution. This 2-pack durable silicone sheath fits on second generation lunchbox mouthpieces. If your mouthpiece is branded with "TSI" on the side of it, it's first generation which m
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Shipping was so fast!!! I love this brand and the company is amazing!!!
