Gasket Replacement 3 Pack

The part nobody thinks about until everything leaks

The gasket is the unsung hero of any insulated bottle. That small silicone ring seated inside the cap is what creates the leak-proof seal between your drink and your bag. And like any rubber component, it eventually stretches, warps, picks up odors from coffee and smoothies, or simply gives out after a year or two of daily dishwasher cycles. When it goes, the whole bottle feels broken — even though it isn't.

S'well sells this three-pack of replacement gaskets for exactly that moment. They're designed to fit the caps on 9oz and 17oz S'well Bottles, and the 10oz and 15oz S'ip by S'well Bottles. That's a specific compatibility list, so check your bottle size before ordering (more on that below).

What replacing it actually fixes

If your S'well lid has started dripping when you tip the bottle sideways, or if there's a faint sour smell that won't wash out, a degraded gasket is the most likely culprit. A new one snaps the lid back to factory-tight and eliminates the odor reservoir that a worn ring creates. Swapping it takes about ten seconds: pry the old gasket out with a fingernail, seat the new one in the groove, and you're done.

We've also seen gaskets slip out during vigorous hand-washing and disappear down the drain — in that case, having a spare already in the drawer is the difference between a usable bottle and a paperweight.

The value case is simple

A new S'well bottle runs $35–$45. This three-pack costs $6. If a leaky lid is the only thing wrong with your bottle, spending $6 to fix it is an obvious call. You also get two extras: one for the next failure, one for a second bottle if you have one in the compatible size range.

What it won't do

The gasket only addresses seal failure. If your cap is cracked, if the threads are stripped, or if the vacuum insulation in the bottle wall has failed (the tell: condensation on the outside, drinks going warm quickly), a new gasket won't help. This is a maintenance part, not a rescue for a bottle that's structurally compromised.

Compatibility is also genuinely narrow. These gaskets are not universal — they will not fit S'well's larger 25oz or 40oz bottles, the Traveler tumbler, or any bottle from another brand. S'well's product line has expanded considerably, and not all caps take the same gasket size.

Bottom line

For anyone who owns a compatible S'well and wants to keep it in rotation, this is a no-brainer add-to-cart. The per-unit cost is laughably low, and having spares means you're never caught with a leaky bag because a $2 silicone ring gave out.