Stanley Aladdin Pour-Thru Stopper / Model No. 13B / #13 Has BOTH rubber rings/seals and upper/lower threads, as shown. Closed position seals thermos. Open position allows for pour-thru without coming loose from thermos neck. Pre-owned, excellent condition. Will be re-washed and sanitized before shipment. Contact me via eBay Messages with any questions. Thanks for visiting.
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