Grosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)
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Choose your baby's stage· One cup that grows with your baby
Material: Stainless Steel
Color: Cherry Peach
Description
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.
Specs
- Capacity: 10oz (300ml)
- Dimensions: 19.4cm H x 8.0cm W
- Weight: 227g
Materials
- Bottle: SUS 316, SUS 304
- Cap, strap ring: BPA-free plastic
- Silicone tip, Silicone stopper: Silicone
- Hand Strap: TPE
Care Guide
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.
Why it works
No sudden spills, only gentle flow!
Making every sip easy for little ones.
Key Features
Easy to sip, safe to carry, simple to use—made for kids and parents
Ergonomic Silicone tip
Shaped to fit comfortably and support your child’s natural drinking motion.
Controlled Flow Rate
Smartly designed to keep liquid from pouring out all at once, making every sip easier and more comfortable for your child.
Hand Strap
Easy-to-carry strap - perfect for preschool, picnics, and outdoor adventures.
One-Touch Cap
Opens with a gentle press and locks back over 180°, keeping the cap away from the mouth for convenience and hygiene.
Designed for Comfort and Safety
Double Walled Insulation
Keeps beverages hot or cold for 6+ hours.
Spill Free Sipping
Easy to sip leakproof straw lid.
Durable
Made from top quality stainless steel and a copper-coated interior.
Non-Slip Silicone Cover
Prevents scratches and slippage for safer use. Quiet placement — stress-free for parents.
What's Included
Everything in the box
Additional straw teats and accessories are available separately.
Stainless Steel Body
SUS 316 inner, 304 outer
Flip-Top Lid
Locks in place
Silicone Drinking Tip
Soft round, gentle flow
Leak Prevention Stopper
Sealed when closed
Convenient Strap
Carry on the go
Care & Sterilization
How to sterilize each part
| Method | Body (SUS 304) | Cap (PP) | Straw (Silicone) | Accessories |
|---|---|---|---|---|
| Hot Water | ✓ | ✓ | ✓ | ✓ |
| UV Sterilizer | ✓ | ✓ | ✗ | ✓ |
| Dishwasher | ✓ | ✓ | ✗ | ✓ |
| Steam | ✓ | ✓ | ✓ | ✓ |
| Microwave | ✗ | ✗ | ✗ | ✗ |
Tips: Do NOT microwave stainless steel. Replace silicone parts every 2-3 months. Always disassemble all parts before cleaning.
The Brand
From Grosmimi. Made in Korea.
Grosmimi crafts PPSU feeding products for babies — from bottles to straw cups to tumblers. Made in Korea, trusted by parents worldwide.
Korean Brand Consumer Evaluation 2023
Infant Products Winner — Feeding Bottle & Straw Cup category.
Loved by parents, recognized by the press
Real reviews
Real parents, real reviews.
Creators using this with their own kids.
Replacement
Policies
Shipping & Returns
Shipping
- Free shipping on orders over $75
- Standard shipping: $5.99
- Ships within 1-3 business days
- Delivery: 5-10 business days
Returns
- 30-day return policy
- Items must be unused and unopened
- Contact hello@onzenna.com to start
- Full refund to original payment
FAQ
Frequently Asked Questions
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Reviews
What Parents Are Saying
Based on 27 reviews
would recommend
this product
Customer Photos
See it in real homes· 14 photos
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Sign In to Write a Review27 reviews
BriAnn B.
Amazing kids cup
I got this cup for my 5 year old to replace his Owala tumbler that always leaks and spills all over his backpack. He loves it! It’s easy to drink from and does not spill
ji
I like there is a silicone bottle to protect the bottom of the bottle
ji
Like the different color
ji
Work really nice!
Katie
Please offer a matching handle in the same color so you can use the straw option, too!
