Grosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)
Grosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)
Choose your baby's stage· One cup that grows with your baby
- 1 Bottle 0–6m
- 2 Straw Cup 6–12m+
- 3 Tumbler 18m+
Material: Stainless Steel
Size & Type: 10oz & Tumbler with Flip Top
Bisphenol-A Free
Double-Wall Insulation
Soft Silicone Tip
Easy-to-Carry Strap
Couldn't load pickup availability
Description
Description
Specs
Specs
Materials
Materials
Care Guide
Care Guide
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No sudden spills, only gentle flow!
Making every sip easy for little ones.
Key Features
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.
Safe, No Polishing Compounds!
Electropolished, not treated with polishing compounds. No residue left behind—just a pristine, premium finish you can trust for safe, everyday use.
Designed for Comfort and Safety
Double Walled Insulation
Keeps beverages hot/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.
Stainless Steel
Stainless Steel is a high-performance material known for its exceptional durability and resistance to rust and corrosion. Commonly used in medical, food, and industrial applications, it is a safe and hygienic choice for various products. Stainless Steel is perfect for baby bottles, cups, and kitchenware as it does not absorb odor or color and maintains its quality even after repeated sterilization. Unlike plastic, it is unbreakable and highly resistant to temperature changes, ensuring long-lasting use. There is no better choice. Now, stainless steel products come in various finishes, from classic silver to modern matte black, offering both style and functionality. Try Grosmimi Stainless Steel.
Innovative Technology
Designed with a soft silicone tip that fits comfortably on a child’s lips. The 16–360° drinking hole lets kids control the flow and drink at their own pace.
Easy Cleaning & Smart Compatibility
Designed to work with the Grosmimi Stainless Straw Cup body for easy tumbler conversion.
● All parts are simply removable.
● Easy to clean.
● Dishwasher safe.
● Easy to reassemble.
The Next Step After the Straw Cup
Kids grow fast! This cup is the natural choice once they outgrow the Gromimi Straw Cup—making the change simple and worry-free
What's Included
Everything in the box
-
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
Additional straw teats and accessories are available separately.
Care & Sterilization
How to sterilize each part
| Method | Body (SUS 304) | Cap (PP) | Straw (Silicone) | Accessories |
|---|---|---|---|---|
| Hot Water | Yes | Yes | Yes | Yes |
| UV Sterilizer | Yes | Yes | No | Yes |
| Dishwasher | Yes | Yes | No | Yes |
| Steam | Yes | Yes | Yes | Yes |
| Microwave | No | No | No | No |
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.
Real reviews
Real parents, real reviews.
Creators using this with their own kids.
Replacement
Weighted Spout kit
Shop Now- Age: +6m
- Strength: Soft
- Durability: Weak
Weighted Straw kit
Shop Now- Age: +6m
- Strength: Soft
- Durability: Weak
Straw Kit Stage 1
Shop Now- Age: +6m
- Strength: Soft
- Durability: Weak
Straw Kit Stage 2
Shop Now- Age: +12m
- Strength: Hard
- Durability: Strong
Stage2 Nipple only
Shop Now- Age: +12m
- Strength: Hard
- Durability: Strong
We're answerable!
When should I replace the straw, and how?
When should I replace the straw, and how?
Grosmimi grows with your child! Start with a baby bottle and easily switch to a straw cup by changing the parts—no need to buy a whole new cup.
EASY TEAT: Available in 4 stages:
(Stage 1: 1–3 months, Stage 2: 3–5 months, Stage 3: 5–8 months, Stage 4: 8 months+)
SPOUT: Great for babies (4M+) starting baby food early.
WEIGHTED KIT: Helps babies (6M+) drink from any angle while holding the cup.
STAGE 1 STRAW: A super soft straw (6M+), made from the same material as baby nipples, helps babies transition to straw drinking comfortably.
STAGE 2 STRAW: A firmer straw (12M+) for older babies. The flow is the same as Stage 1, but the silicone is stronger. Switch to Stage 2 when babies start chewing more.
- Silicone straws & mouthpieces: Every 2-3 months
- PPSU bottle: Every 6-12 months
- Replacement timing may vary based on usage.
What’s the difference between stage 1 and stage 2 straws?
What’s the difference between stage 1 and stage 2 straws?
- First-stage: Softer, for beginners or non-chewers.
- Second-stage: Firmer, for children over 12 months who chew frequently.
- Grosmimi cups come with first-stage straws by default.
How do I sterilize Grosmimi straw cups at home?
How do I sterilize Grosmimi straw cups at home?
It can also be hygienically maintained through various sterilization methods, including boiling, steam sterilization, dishwasher, UV sterilization, and microwave sterilization.
What is the function of an air valve?
What is the function of an air valve?
It helps regulate pressure balance when there is a difference between internal and external pressure, requiring a pinch to function properly. This feature is especially useful when there is a temperature difference with external environments, such as warm water, and plays a crucial role in preventing leaks.
How do I choose the right cup size?
How do I choose the right cup size?
If your baby is new to straw cups, the shorter 200ml size is often easier for them to handle. For basic use like water or small quantities of liquids, 200ml is sufficient. If your child drinks more or if you plan to fill it with milk or other beverages, a 300ml cup is recommended.
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- HKHelen K.Verified BuyerReviewingGrosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)I recommend this productRated 5 out of 5 stars3 months agoAbsolutely love this tumbler! The quality is amazing
Absolutely love this tumbler! The quality is amazing, easy for little hands to hold, and it keeps milk fresh for a long time. My daughter now drinks her milk only from this bottle 😊 Highly recommend for toddlers!
- NBNikki B.Verified BuyerReviewingGrosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)I recommend this productRated 5 out of 5 stars4 months agoAmazing PPSU tumbler
This PPSU tumbler has quickly become our go to cup! It’s easy for our kiddo to open and the slow flow stream makes so that he doesn’t choke as he drinks.
- BBBriAnn B.Verified BuyerReviewingGrosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)I recommend this productBaby's Age 2 Years - 8 YearsBaby's Height 36.5 Inches to 42.5 InchesRated 5 out of 5 stars7 months agoAmazing 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
- EKElizabeth K.Verified BuyerReviewingGrosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)I recommend this productRated 5 out of 5 stars8 months ago5 Stars
I like there is a silicone bottle to protect the bottom of the bottle
- EKElizabeth K.Verified BuyerReviewingGrosmimi Stainless Steel Kids Tumbler - 10oz (18 Months+)I recommend this productRated 5 out of 5 stars8 months ago5 Stars
Like the different color
