Grosmimi Stainless Steel Tumbler - 10oz (300ml)
Grosmimi Stainless Steel Tumbler - 10oz (300ml)
Material: Stainless Steel
Size & Type: 10oz & Tumbler with Flip Top
Bisphenol-A Free
Double-Wall Insulation
Soft Silicone Tip
Easy-to-Carry Strap
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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
Replacement
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.
- JMJessica M.Verified BuyerReviewingGrosmimi Stainless Steel Tumbler - 10oz (300ml)I recommend this productBaby's Age 2 Years - 8 YearsBaby's Height 31.5 Inches to 36.5 InchesRated 5 out of 5 stars21 hours agoLove! Nothing else like it
Love that all the parts come apart for easy cleaning no hidden mold! My girl loves it because she feels like a big independent girl not using a straw.
- EBElexus B.Verified ReviewerReviewingGrosmimi Stainless Steel Tumbler - 10oz (300ml)I recommend this productBaby's Age 6 Months - 2 Years, 2 Years - 8 YearsBaby's Height 26.5 Inches to 31.5 Inches, 31.5 Inches to 36.5 InchesRated 5 out of 5 stars1 week agoPerfect Water Tumbler
I love the stainless steel option for my little ones because for long days out and about— this bottle is perfect and keeps my little ones water cold. The one touch cap makes it easy for my 16 month old to open and close (he learned how to press and open it since he was 11 months) and all the parts are so easy to clean. Love the seamless design and the cute patterns it comes in. These are a family favorite and my baby + toddler loves their tumblers. (:
- KPKayom P.Verified BuyerReviewingGrosmimi Stainless Steel Tumbler - 10oz (300ml)I recommend this productBaby's Age 6 Months - 2 YearsRated 5 out of 5 stars1 week agoLove
The lip style makes it so easy to clean. I love that they made it so that the water doesn't spill everywhere, especially as we are using this as a transition cup from using just straws to using cups. They have the cutest designs. My daughter carries this on her arm like a handbag.
- YCYoomi C.Verified BuyerReviewingGrosmimi Stainless Steel Tumbler - 10oz (300ml)I recommend this productBaby's Age 6 Months - 2 YearsRated 5 out of 5 stars1 week agoCutest tumbler for my toddler
The Grosmimi stainless steel tumbler is a very well designed tumbler that is perfect for my growing toddler. It's durability and lovely style makes it definitely worth the price. My friend gifted me my baby's first tumbler and I fell in love. I bought this as a back up (which is why it is still in the box) for my toddler who often drops her tumbler, but her first tumbler is still going strong which makes me trust the quality and durability to make a purchase from the brand.
My toddler can use the one touch flip cap making it super easy to open and close for her without my assistance. The hand strap is also a great touch that encourages her to carry her own bottle with confidence and ease. The tumbler is also leak-proof and the controlled flow rate for the mouth tip also helps your toddler practice drinking without the sippy cup tip. I also love the cute designs they offer which isn't too common among other tumblers I see offered online.
Overall it is an amazing product that is smart, safe, durable and super cute! I would definitely recommend this to all moms!
- TTTaisiia T.Verified BuyerReviewingGrosmimi Stainless Steel Tumbler - 10oz (300ml)I recommend this productBaby's Age 6 Months - 2 YearsRated 5 out of 5 stars1 week agoLove 🤩
This isn’t our first bottle from this brand — my kids absolutely love it. The quality is great, and the handle and spout are very convenient. We’re really happy with it!
