Spare lids for the Glacier Bottle (Chug lid only), 11oz Capsule and 18.8oz Booster bottles can be found here:
https://www.planetbox.com/collections/spare-parts
https://www.planetbox.com/collections/drinkware
No parts are available for the Straw Top Glacier Lid, Sip Spout, Pour Spout or 18oz Bottles.