Quick answer
Remove the old OctaLock gasket from your Hopsulator Duo or Trio, align the new one so the tab sits flat, then press firmly around the entire rim until it seats evenly.
Why the OctaLock gasket matters
The OctaLock lid system uses a flexible silicone gasket to create a leak-resistant seal between the lid and your tumbler. Over time, gaskets can wear out, get lost, or become misshapen during cleaning. A gasket that is not properly seated can let air in, reduce insulation performance, or cause drips in a bag or cup holder.
BrüMate’s replacement gaskets are designed specifically for the Hopsulator Trio and Duo OctaLock lids. They come in colors such as Rose Taupe, Mocha, or Kiwi, so you can match or accent your drinkware. Each gasket is a genuine BrüMate part, so the fit and flexibility are exactly what the lid was engineered for.
When to replace the gasket
You need a new gasket if your lid no longer seals tightly, if the gasket is torn, or if you have lost it entirely. A quick test: fill your tumbler with water, close the lid, and tip it sideways. A few drops mean the seal needs attention. If the gasket looks warped or has hard spots, swap it out before your next outing.
Step-by-step installation
- Remove the old gasket: Turn the lid over so the gasket ring is visible. Gently pull the old gasket away from the rim, working your fingers around the whole circumference. Dispose of it. If the old gasket is stuck, use a plastic spudger or the edge of a credit card—never a metal tool that could scratch the lid.
- Clean the lid channel: Use warm soapy water and a soft cloth to wipe the groove where the gasket sits. Rinse and dry thoroughly. Any residue or moisture can prevent the new gasket from seating flat. Let the lid air-dry for a minute to ensure the channel is completely dry before installing the new gasket.
- Align the new gasket: Place the new BrüMate OctaLock gasket into the lid channel, starting at one point. The gasket has a small alignment tab that should sit flush against the lid edge. Press the gasket into the groove along the entire ring. A common mistake is to twist the gasket while pressing—check that the tab stays flat and the gasket is not bunched or folded.
- Seat the gasket evenly: Use your thumb or finger to run around the entire gasket, pressing it firmly into the channel. You should feel the gasket 'pop' into place. Inspect for any gaps or raised sections. If a section still lifts, remove the gasket and start again—pressing over a misaligned area can cause permanent distortion.
- Test the seal: Close the lid onto a clean, empty tumbler. Turn the lid—if the gasket is seated properly, the lid should rotate smoothly and feel snug. Then fill the tumbler with water, close the lid, and tip it 90 degrees to check for leaks. If water seeps out, the gasket is not fully seated. Remove, re-seat, and repeat the test. Do not force the lid shut.
Choose the right replacement gasket
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Hopsulator Duo/Trio OctaLock™ Gasket | Rose Taupe: Compatible with OctaLock™ Hopsulator Trios and Duos. Available in Rose Taupe. If your current gasket is lost or damaged, this genuine part restores the seal and helps your tumbler stay leak-free.
Hopsulator Duo/Trio OctaLock™ Gasket | Rose Taupe
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Hopsulator Duo/Trio OctaLock™ Gasket | Mocha: Made for OctaLock™ Hopsulator Trios. Mocha color matches darker drinkware. A color-matched gasket keeps your tumbler looking cohesive while maintaining the same BrüMate performance.
Hopsulator Duo/Trio OctaLock™ Gasket | Mocha
