Original Bottle
Stylish triple-walled steel bottle, but the screw cap has a plastic inner body - water contacts plastic at the lid, so it is not plastic-free.
Plastic-free verdict: Minimal plastic contact
The body is triple-walled 18/8 stainless steel, but the classic Original cap pairs a stainless steel outer shell with a plastic inner cap body and a silicone seal - so the drink-contact surface of the lid is plastic, not steel. The Traveler flip-straw lid is all-plastic on the inside. Included as a corrective: the steel-and-silicone marketing hides a plastic cap interior in the water path. Note S'well also sells a Glass Original line whose lid is all stainless steel with a silicone gasket - that one is materially different (silicone-only) and is not this product.
Verification: Manufacturer confirmed · reviewed 2026-07-05
What it's made of
| Part | Material | Food contact |
|---|---|---|
| bottle body (triple-wall insulated) 18/8 (304) stainless steel | Stainless Steel (304 / 18-8) | Yes |
| cap inner body plastic inner cap body; the drink-contact surface of the lid | Plastic (other / unspecified) | Yes |
| cap outer shell 18/8 stainless steel outer cap shell (cosmetic/exterior) | Stainless Steel (304 / 18-8) | No |
| cap seal silicone sealing gasket | Silicone | Yes |
S'well's signature slim, triple-walled insulated bottle, known for its finishes more than its materials transparency. The body is steel, but the screw cap is a steel shell over a plastic interior, so water touches plastic at the lid. The flip-straw Traveler lids are largely plastic inside as well. It is a well-made insulated bottle, but not a plastic-free-water-path choice. S'well's separate glass-bodied line uses an all-steel lid with a silicone gasket and is the more plastic-conscious option in their range.
Pros
- Triple-wall insulation; strong finishes and design
- 18/8 steel body
- A glass-bodied S'well line with an all-steel-lid exists as a better option
Cons
- Classic cap has a plastic inner body - water contacts plastic at the lid
- Traveler flip-straw lid is all-plastic inside
- Materials of the cap are not prominently disclosed
Notes
- Classic cap - stainless outer shell, plastic inner body, silicone seal (retailer/community reported)
- S'well Glass Original bottle uses an 18/8 stainless steel lid with a removable food-grade silicone gasket (a distinct, more plastic-free product)
Categories: Water Bottles
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://www.swell.com/products/silver-lining-cap Original bottle cap combines stainless steel with a plastic cap body and a silicone seal
- manufacturer https://www.swell.com/products/traveler-flip-straw-lid Traveler Flip Straw Lid is largely plastic on the interior (community-reported all-plastic drink path)
- manufacturer https://www.swell.com/pages/glass-original-bottle S'well Glass Original uses an all-stainless-steel lid with a removable food-grade silicone gasket - the more plastic-free option in the S'well line