PlanetBox - Replacement Spout Seal for Booster + Capsule
PlanetBox - Replacement Spout Seal for Booster + Capsule for Booster and Capsule Caps only. The spout seal sits in the cap top to seal the mouth spout so it doesn't leak. Does not fit the 12 oz Sip Spout Bottle or the 18 oz Stainless Steel Bottle with wide-open mouth and tethered cap.