Grosmimi Stainless Steel Straw Cup with Flip Top - 10oz (12 Months+)
Developmentally-engineered stainless steel straw cup for Grosmimi babies.
STAINLESS STEEL STRAW CUP
Grosmimi Replacement Straw Nipple only 4-counts Stage 2 (12 Months+)
$22.00
Specification details coming soon.
Straw is made of silicone
4 counts of Stage 2 straw-nipples(12m+) for any Grosmimi cups and bottles.(No tubes, no kits are included).
Flow of Stage 1 and Stage 2 is the same, but the hardness of silicone is different. Need to change to stage 2 when babies chew a lot with their teeth.
The straw is made of same material with baby nipples. Babies will get used to straw without any rejection.
“+” cut prevents any leaking, the straw can be cut into appropriate length according to the height of the cup during use.
Straw teat is made up of platinum silicone which is a very hygienic and safe, BPA-free material.
Silicone straws are also compatible with other selected brands wide neck bottles.
The smoothness of the straw protects baby’s teeth and gum.
RECOMMENDATIONS & WARNINGS:
- Always use this product with adult supervision.
- Never use straws as a soother.
- Continuous and prolonged sucking of fluids will cause tooth decay.
- Always check food temperature before feeding.
- Inspect before each use and pull the straw in all directions. Throw away at the first signs of damage or weakness.
- Do NOT leave in disinfectant for longer than recommended, as this may weaken the teat.
- Before first use place a feeding teat in boiling water for 30 seconds. This is to ensure hygiene.
- Please wash before using.
- Please use a nipple brush when washing the nipple.
- Avoid direct sunlight or fire.
- Please replace the silicone parts every 2-3 months for sanitation issues.
- Straws are not suitable for a child under 6 months.
- Please check the package instructions before using.
What makes it special
Innovative Technology
Made from liquefied silicone—the same material used for baby bottle nipples—the straw offers a familiar texture that feels gentle and natural for babies. This helps them transition to using a straw without resistance, while the cross-cut design prevents leaks and backflow for a cleaner drinking experience.
Effortless Cleaning & Assembly
All parts are designed to be easily removable, making cleaning simple and convenient. The cup is dishwasher safe, and its intuitive design allows for quick and easy reassembly after washing.
Customize your own bottle
A variety of kits are available (sold separately), allowing you to choose the setup that best fits your baby’s feeding style. With a wide range of options, you can mix and match parts to create your own customized bottle. The system is also compatible with selected products from other brands.
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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.