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 PPSU Kids Tumbler - 10oz (18 Months+)
$34.80
$38.50
- Capacity: 10oz (300ml)
- Dimensions: 18.4cm H x 8.0cm W
- Weight: 133g
- Bottle: PPSU
- Cap, strap ring: BPA-free plastic
- Silicone tip, Silicone stopper: Silicone
- Hand Strap: TPE
The Grosmimi PPSU Kids Tumbler (10oz / 300ml) is designed for everyday use with lightweight durability and safe materials. Made from premium PPSU plastic, it’s an ideal tumbler for little hands—perfect for home, school, or outings.
Durable PPSU Body
Crafted with high-quality PPSU material that is BPA-free, impact-resistant, and built to withstand daily use. It’s lightweight yet tough, making it easy for kids to carry.
Heat & Odor Resistant
PPSU is known for its ability to resist staining, odor absorption, and high heat—keeping drinks fresher for longer.
Silicone Drinking Tip
Gentle on gums and teeth, the BPA-free silicone tip makes sipping easy, comfortable, and safe for kids.
One-Touch Cap with Lock
A secure flip-top lid that opens easily with one touch while preventing leaks when closed. Includes a hand strap for portability—great for school and travel.
Easy to Clean
All parts, including the silicone tip, ring, cap, and strap, can be fully detached for thorough cleaning. Dishwasher-safe for convenience.
Usage & Assembly
- Read the user manual and safety instructions thoroughly before use.
- Ensure all parts are assembled correctly and securely before use.
- This product is not completely leak-proof. For storage or transport, place it in a sealed bag or container.
Precautions
- Store away from heat sources and direct sunlight.
- Be cautious when storing carbonated beverages, as internal pressure may build up.
- Always open the lid upright to avoid spills.
- Logos and measurement markings may fade over time depending on usage conditions.
- Bubbles or spots may appear during the PPSU molding process, but this is not a defect and does not affect product safety or functionality.
Storage & Handling
- Avoid direct sunlight and high temperatures.
- Store out of children's reach and use under adult supervision.
Cleaning and Maintenance
- Please wash the product thoroughly before first use.
- Clean and dry immediately after use to prevent stains and odors.
- To prevent damage, we recommend using a cleaning brush specifically designed for this type of product.
- If not used for a long time, ensure the tumbler is completely dry before storing.
- Due to the nature of the silicone material, it may have a distinct odor.
- We recommend air drying for at least 24 hours after washing.
What makes it special
Premium PPSU Material
PPSU (Polyphenylsulfone) is a high-performance material used in medical devices that require repeated sterilization. It is extremely durable, heat-resistant, and does not absorb odor or color. Grosmimi PPSU bottles are available in the original PPSU yellow and a newly released dark grey.
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.