Silicone Sealing Rings Soft Replacement Gaskets Rubber O Rings Washers for Thermoses Vacuum Bottle Bullet Flask Covers Stopper - AliExpress
Price: $ 4.00
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Freebily 10Pcs Silicone Sealing O-Rings Gaskets for 4.5/5.2cm Bottle Cover Mug Stopper Thermal Cup Lid Outdoor Travel Bullet Flask Covers White 1.8 inches : : Home & Kitchen
How to get this black stuff off my rubber bottle seal? I've tried soaking it in hot water and using a knife to try and scrape it off, but nothing's worked
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Silicone Sealing Rings Soft Replacement Gaskets Rubber O Rings Washers for Thermoses Vacuum Bottle Bullet Flask Covers Stopper - AliExpress