The Gray Thermos Stopper #650 is a replacement part for a Thermos lunchbox, specifically designed for plastic Thermos models from the 1970s onwards. Made of durable plastic material, this stopper is essential for keeping your food fresh and securely sealed while on the go. Perfect for collectors or those looking to replace a missing part on their Thermos lunchbox, this product ensures a secure and convenient way to enjoy your meals on the move.