Free Worldwide Shipping On Accessory Orders Over USD$350

S'well Filter Cap



The Filter Cap lets you enjoy fresh-tasting tap water, wherever you bring your S’well! Simply fill from the tap, secure the cap, and sip for instant filtration. This leak-free cap features a protective cover and an ergonomic drink-through spout. Our premium carbon filter meets NSF standards to reduce chlorine and particulates, while improving taste and odor. The S’well Filter Cap fits our 9oz and 17oz Original bottles and comes with one filter.

  • Filters chlorine and particulates.

  • Improves taste and odor of tap water.

  • Independently tested to meet NSF-42 standards.

  • Leak-free, protective hygienic cap.

  • BPA/BPS-free.

  • One filter spans 3 months or 40 gallons of water, which is equivalent to 300 single-use plastic water bottles!


Fits 9oz and 17oz S’well Bottles. Approx. 1.73″D x 1.85″W x 5.98″H, 0.15lbs


Consult your local water provider for water quality details or if you have a well, have your water tested by a qualified water testing lab. Filter is intended to be used with potable (municipal tap) water only. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after filtration. Do not use with hot or carbonated water. Do not place in dishwasher, microwave or freezer.


Instructions for First Use:

  • Remove from outer packaging
  • Rinse the filter under cold running water for one minute
  • Press the opening of the filter into the cap base until it clicks into place
  • Fill bottle* with cold or room temperature water
  • Screw on cap securely
  • Flip oven cover, tilt, and drink in water through spout (feels similar to sipping a smoothie)