Kiki
The rare 100% plastic-free bottle system - 18/8 stainless body and steel collar, only the interchangeable top is medical-grade silicone.
Plastic-free verdict: Silicone only
Everything hard is 18/8 stainless steel - the bottle body AND the screw collar - which is what sets Pura apart from glass bottles that hide a plastic ring. The only non-steel parts are medical-grade silicone: the interchangeable top (infant nipple, sippy spout, or straw), the protective sleeve, and the travel cover. No polypropylene anywhere in the drink path. As close to plastic-free as a leak-proof modern bottle gets; only the silicone keeps it from a full plastic-free rating.
Verification: Manufacturer confirmed · reviewed 2026-07-05
What it's made of
| Part | Material | Food contact |
|---|---|---|
| bottle body 18/8 (304) stainless steel | Stainless Steel (304 / 18-8) | Yes |
| collar / screw ring steel, not plastic - the key differentiator vs. glass bottles | Stainless Steel (304 / 18-8) | Yes |
| infant nipple (variant) 100% medical-grade / platinum silicone anti-colic natural vent nipple | Silicone | Yes |
| sippy spout (variant) XL Sipper Spout, medical-grade silicone with built-in valve; swaps onto same body | Silicone | Yes |
| straw top (variant) silicone straw top, another interchangeable option on the same bottle | Silicone | Yes |
| protective sleeve medical-grade silicone; removable | Silicone | No |
| travel cover medical-grade silicone cap that covers the nipple/spout for travel | Silicone | No |
A single modular stainless steel system that "grows" with the child: one 18/8 stainless bottle body accepts interchangeable medical-grade silicone tops, so the same bottle becomes an infant bottle, a sippy cup, a straw bottle, or a sport/water bottle just by swapping the top. Bottles come in 5oz, 7oz (insulated), 9oz, and 11oz sizes, insulated and non-insulated, each with a silicone sleeve and travel cover. MadeSafe certified and marketed as the only 100% plastic-free stainless steel baby bottle on the market.
Pros
- Steel collar/ring, not plastic - avoids the hidden-PP problem of glass bottles
- One bottle covers infant through toddler by swapping silicone tops
- Stainless is unbreakable and doesn't shed microplastics with hot formula
- MadeSafe certified; brand's whole identity is plastic-free
Cons
- Not truly plastic-free for zero-silicone purists (all soft parts are silicone)
- Opaque steel - can't see how much milk is left
- Silicone tops wear and need periodic replacement
- Pricier than plastic bottles
Notes
- One product line, several variants: 5oz/7oz/9oz/11oz, insulated and non-insulated
- Same body accepts infant nipple, XL Sipper sippy spout, straw top, or sport cap - tops sold separately
- Belongs in both the baby-bottle and sippy-cup roundups because of the swap-top design
Categories: Baby Bottles · Sippy Cups & Toddler Cups
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://www.purastainless.com/products/kiki%E2%84%A2-5oz-infant-bottle 5oz infant bottle - 18/8 stainless body and collar, 100% platinum/medical-grade silicone nipple + sleeve, "zero plastic"
- manufacturer https://www.purastainless.com/products/pura-kiki-11oz-sippy-bottle-with-sleeve 11oz sippy - 18/8 stainless body and collar, 100% medical-grade silicone XL Sipper spout and sleeve, no plastic
- review https://www.amazon.com/Pura-Anti-Colic-Plastic-Free-Medical-Grade-Medium-Flow/dp/B0CLT2B4TK listing confirms 100% plastic-free, MadeSafe certified, medical-grade silicone nipple
- manufacturer https://www.purastainless.com/products/pura-kiki-xl-sipper-spouts XL Sipper spouts are 100% medical-grade silicone and interchange across all Pura bottles, confirming the modular one-line design
- review https://gimmethegoodstuff.org/blogs/guides-and-product-reviews/the-best-non-toxic-baby-bottles independent guide lists Pura as totally plastic-free stainless option that converts from infant to toddler