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Grosmimi Stainless Steel Tumbler - 10oz (300ml) - Zezebaebae

Grosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)

$49.80

$54.80

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  • Capacity: 10oz (300ml)
  • Dimensions: 19.4cm H x 8.0cm W
  • Weight: 227g
  • Bottle: SUS 316, SUS 304
  • Cap, strap ring: BPA-free plastic
  • Silicone tip, Silicone stopper: Silicone
  • Hand Strap: TPE

The Grosmimi Stainless Steel Kids Tumbler (10oz / 300ml) is designed for little hands and big adventures. With premium stainless steel construction and a leak-resistant flip-top cap, it’s the perfect tumbler for everyday hydration—whether at school, on outings, or at home.

Durable Stainless Steel Body

Built with 304 stainless steel on the outside and 316 stainless steel on the inside for safety, hygiene, and long-lasting use.

Double-Wall Insulation

Keeps drinks at their ideal temperature for hours, so kids can enjoy water, juice, or warm tea fresh anytime.

Silicone Drinking Tip

Gentle on gums and teeth, the BPA-free silicone tip makes sipping easy and safe.

One-Touch Cap with Lock

A one-touch flip design that prevents leaks when closed, making it perfect for on-the-go use. Hand Strap Included Comes with a sturdy strap so kids can carry it independently—great for school and travel.

Easy to Clean

Fully detachable parts (silicone tip, ring, cap, and more) make cleaning and sanitization simple. 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

  • Do not use in a microwave or oven.
  • Always check the temperature before drinking hot beverages to avoid burns.
  • Be cautious when storing carbonated drinks due to pressure build-up.
  • Always open the lid in an upright position to prevent spills.
  • Keep away from heat sources and direct sunlight.
  • Drinks with high salt content may cause rusting.

Storage & Handling

  • Avoid direct sunlight and high temperatures.
  • Store out of children's reach and use under adult supervision.

Cleaning and Maintenance

  • Wash all parts thoroughly before first use.
  • No polishing agents were used during electro-polishing, so it can be used after washing with a neutral detergent—no extra cleaning required.
  • Use a soft brush to prevent scratches or damage.
  • If not used for an extended time, wash and dry completely before storing.
  • Silicone parts may have a natural odor—air dry for at least 24 hours after washing.

What makes it special

Stainless Steel

Stainless steel is a durable, rust-resistant material widely used in medical and food applications. It does not absorb odor or color and maintains its quality even after repeated sterilization. Strong, hygienic, and highly resistant to temperature changes, it is an excellent choice for baby bottles, cups, and everyday kitchenware.

Stainless Steel
  • Stainless Steel
  • Verified Benefit

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.

Innovative Technology
  • Innovative Technology
  • Verified Benefit

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.

Effortless Cleaning & Assembly
  • Effortless Cleaning &
  • Verified Benefit

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.

Customize your own bottle
  • Customize your own
  • Verified Benefit

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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.