Backed by science, trusted by parents
Material Fact
MATERIALS
01SAFETY
02DESIGN
03PPSU Bottle
Medical-grade PPSU with glass-like clarity — 2,750× fewer microplastics
PPSU Straw Cup
PureSeal triple-seal system — zero leakage, stage-based straw resistance
PPSU Tumbler
Handle-free design for independence — builds oral motor skills
Stainless Straw Cup
Thermal feedback for sensory development — weighted base design
Stainless Tumbler
The graduation cup — no training features, earned independence
PP baby bottles release up to 16.2 million microplastic particles per liter during formula preparation with heated water.
PPSU demonstrates zero detectable chemical migration under standard food-contact conditions. A non-intentionally added substance (NIAS) assessment confirmed safety.
Infants fed with polypropylene bottles ingest an estimated 1.58 million microplastic particles per day — 2,600x more than adult dietary microplastic exposure.
PPSU maintains full structural integrity after 1,000+ sterilization cycles with no measurable degradation in thermal or mechanical performance.
Microplastics were detected in ALL polypropylene feeding bottles during simulated daily use conditions using laser imaging techniques.
PPSU releases 2,750x to 11,000x fewer microplastics than polypropylene — 1,465–5,893 particles/L versus 16.2 million.
Trusted by parents worldwide
Switched from PP bottles after learning about microplastics. The PPSU material gives us such peace of mind. Best purchase we've made for our baby.
Three months in, not a single leak. I've tested it upside down in the diaper bag. The PureSeal system actually works.
The wide opening makes cleaning so easy. I can see every surface — no hidden mold anywhere. Game changer for busy mornings.
My toddler drops this cup at least 5 times a day. Still looks brand new after 6 months. PPSU is incredibly durable.
Her speech therapist recommended straw cups over sippy cups. Grosmimi's straw resistance is perfect for oral motor development.
Medical-grade materials for a baby cup? Sounds overkill until you read the data on microplastics. Now it sounds essential.
Simplest cup I've ever cleaned. 4 parts, wide neck, done in 30 seconds. My old bottles took forever to scrub.
The modular design means we didn't need new cups every stage. One system, interchangeable parts. Brilliant engineering.
My baby grabbed the red cup immediately. Apparently babies see red first — the science behind the color choices is genius.
Parents ask, science answers.
What makes PPSU safer than regular plastic?
PPSU (Polyphenylsulfone) is a medical-grade polymer used in surgical instruments. Unlike standard PP or PC plastics, PPSU releases 2,750x fewer microplastics when exposed to heat — verified by peer-reviewed research published in Nature Food (2020). It contains zero BPA, BPS, or BPF.
How do I sterilize Grosmimi products?
PPSU withstands temperatures up to 180°C. You can boil, steam-sterilize, or UV-sterilize safely. Our products are rated for 1,000+ sterilization cycles with zero degradation — no warping, no discoloration, no chemical leaching.
What age range are your products designed for?
Grosmimi products cover ages 0 to 4 years, mapped to developmental milestones. Baby bottles for 0–6 months, straw cups for 6–18 months, tumblers for 18–36 months, and tableware for 12–48 months. Each product is engineered for the specific motor and oral development stage.
Is the straw cup really leak-proof?
Yes. Our patented PureSeal system uses a weighted stainless-steel ball and silicone valve to create a zero-leak seal in any orientation. Sideways, upside-down, in a diaper bag — guaranteed leak-proof or your money back.
Why is Grosmimi more expensive than other brands?
Standard PP bottles cost less because polypropylene is cheap — but it releases millions of microplastic particles per feeding. PPSU is a medical-grade material that costs significantly more to manufacture. Combined with SUS316 stainless steel components and precision engineering, the price reflects genuine material science, not marketing.
Where can I buy Grosmimi products?
Grosmimi is available on Amazon, our official Shopify store, and through select retailers including Target, Nordstrom, and Babylist. International shipping is available through our online store.
Do you offer a warranty or guarantee?
Every Grosmimi product comes with a leak-proof guarantee and a 1-year warranty against manufacturing defects. If your product leaks or shows signs of material degradation under normal use, we will replace it — no questions asked.