i
S'well Original Bottle

S'well Original Bottle

Not recommended

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.

We don't recommend this one

The classic cap is a steel shell over a plastic inner body, so the drink-contact surface is plastic; the glass-bodied Original is the better S'well.

The 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 · Last reviewed July 2026

What it's made of

PartMaterialWater contact
bottle body (triple-wall insulated)
18/8 (304) stainless steel
Stainless Steel
304 / 18-8
Yes primary
cap inner body
plastic inner cap body; the drink-contact surface of the lid
Plastic
other / unspecified
Yes primary
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 primary

S'well's signature slim, triple-walled insulated bottle, known more for its finishes and gift-y designs than for materials transparency. It's a well-made insulated bottle sold in a wide range of sizes and prints; the catch is the cap. (If you want the S'well look with a steel drink path, their glass-bodied Original line is the one to reach for - see that entry.)

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

Common questions

Does the S'well Original Bottle have plastic in it?

Yes. On the S'well Original Bottle, the cap inner body is plastic and sits in the water path. The rest of what touches your water is stainless steel.

What is the S'well Original Bottle made of?

Part by part, the S'well Original Bottle is: bottle body (triple-wall insulated) — stainless steel; cap inner body — plastic; cap outer shell — stainless steel; cap seal — silicone.

Does the S'well Original Bottle have silicone in it?

Yes — the cap seal is silicone on the S'well Original Bottle. That is a primary contact surface, not just a seal — your water is in direct contact with it.

Where is the S'well Original Bottle made?

The S'well Original Bottle is made in China.

Categories: Water Bottles

Sources

Every material claim above is backed by these. This is the scattered info we centralized.

Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.