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Newly designed leak-proof silicone washers are placed inside the lid of your bottle to ensure airtight sealing and to avoid leaking.
Our new and improved washers are designed to avoid leaking by creating a ridged sealing edge on both sides. There is no longer a need to flip the washer to the ridged side.
To remove the washer, use a teaspoon or butter knife and slowly stir the washer out from the lid to clean.