I just purchased a refill package from Costco that included 2 plastic rinse bottles and 250 salt packets. How do I get rid of the distasteful and unp

I just purchased a refill package from Costco that included 2 plastic rinse bottles and 250 salt packets. How do I get rid of the distasteful and unpleasant plastic smell taste of the plastic bottle when doing the rinse? None of my previous bottles have had this problem.Thank you -Kern Holsinger