Grosmimi PPSU Straw Cup - 6oz (6 Months+)
Grosmimi PPSU Straw Cup - 6oz (6 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: PPSU
Size & Type: 6oz & Regular Top
Free shipping on orders $75+ · Ships within 1 business day
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Bisphenol-A Free
Medical grade material
Medical grade material
Leak-Preventing (+) Cut Design
Description
Description
Specs
Specs
Materials
Materials
Care Guide
Care Guide
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Korea’s No.1 Toddler Straw Cup
946,000+
Cups sold annually
30+ Countries
Loved by Moms Worldwide
Patented tech
related to straw nipples
CPSIA Compliant
Tested by a CPSC - verified Laboratories
Leak-Proof Design
Squeeze it. Pinch it. It won't leak.
The + cut straw tip seals under pressure. Toss it in the diaper bag — no spills, no mess.
Durable PPSU
Babies drop things. This cup handles it.
FDA compliant PPSU is incredibly durable — used for medical devices that get sterilized over and over.
360° Rotating Handles
Grip from any direction. No wrong way to hold it.
Handles rotate freely so small hands can grip from any angle.
Sealed in Motion
Shake it. Swing it. Still sealed.
Toddlers don't just drink — they shake, throw, and swing. The + cut straw stays sealed through all of it.
One of the Top 5 Best-Selling Toddler Straw Cup Brands on Amazon US
#1 Best-Selling PPSU Straw Cup
Over 8,000 reviews ★ 4.5 out of 5.0 rating
- Forbes
The Material
Why PPSU matters.
Not all baby bottle plastics are the same. PPSU is an FDA-compliant thermoplastic commonly used for medical devices that require repeated high-temperature steam sterilization — the same class of material trusted for reusable hospital equipment. That stability is why Grosmimi builds every cup and bottle from it.
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FDA
Compliant — used for medical devices requiring steam sterilization
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BPAFree
Zero Bisphenol A in the material
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392°F
Heat resistance — safe from -4°F to 392°F
Peer-reviewed research has measured microplastic release from baby bottles under heat. Findings show polypropylene (PP) bottles release substantially more particles than PPSU and other advanced materials. The directional finding that PPSU is more stable than PP under heat is consistent across studies.
References
Premium PPSU Material
PPSU (Polyphenylsulfone) is a type of high performance polymer. Material commonly used for medical devices requiring repeated steam sterilization. It is incredibly durable and temperature resistant.
PPSU is perfect material for baby bottles or cups. It is a plastic but has the benefits of glass. Which does not absorb odor or color and you can sterilize without any deformation.
There is no better choice.
Now there are two types of PPSU body colors. One is the original PPSU color yellow and the other is dark grey which is newly released.
Try Grosmimi PPSU.
Innovative Technology
● Made from liquefied silicone.
● Which is material for baby nipples.
● The textures are about the same.
● Babies can get used to a straw without any resistance.
● Cross cut straws will not leak or backflow.
Effortless Cleaning & Assembly
● All parts are simply removable.
● Easy to clean.
● Dishwasher safe.
● Easy to reassemble.
Customize your own bottle
● We got variety of kits.(sold separately)
● No matter which feeding style you have.
● Any combination is possible.
● You can customize your own bottle with a wide selection.
● It is also compatible with other selected brands.
Selection Guide
Start small, then size up.
When using a straw cup for the first time, a 200ml cup with a short tube is easier for babies to handle. If your baby starts drinking more, or you plan to use the cup for milk or beverages, we recommend a 300ml straw cup.
When babies start teething, they begin to chew on the straw teat. For babies over 12 months who tend to bite, a firmer straw teat is available separately.
Grows With Your Baby
One system, every stage.
Grosmimi's full product line covers every stage — from bottle to straw cup to tumbler. Each product is compatible with the same accessories, so you invest in a system, not throwaway cups.
What's Included
Everything in the box
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PPSU Bottle
FDA compliant
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One Touch Cap
Steel-free
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Silicone Straw Teat
Included
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Handle
Detachable
Includes Stage 1 Straw Kit. Additional straw teats and accessories are available separately.
Care & Sterilization
How to sterilize each part
| Method | Bottle (PPSU) | Cap (PP) | Straw/Teat (Silicone) | Weighted Bead |
|---|---|---|---|---|
| Hot Water | Yes | Yes | Yes | Yes |
| UV Sterilizer | Yes | Yes | No | Yes |
| Dishwasher | Yes | Yes | No | Yes |
| Steam | Yes | Yes | Yes | Yes |
| Microwave | Yes | No | No | No |
Tips: Replace silicone parts every 2-3 months, or immediately if torn. Hot water sterilization within 5 minutes. 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!
What is PPSU?
What is PPSU?
The safe material, PPSU, is a lightweight yet highly durable and heat-resistant medical-grade material, making it safer to use without the risk of shattering like glass.
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.
What's your return policy?
What's your return policy?
Unopened items can be returned within 30 days. Customer-remorse returns carry a 15% restocking fee and a $7.99 return label; defective or incorrect items are always free to return. Some items (Alpremio, Comme Moi, food products, gift cards) can't be returned — see our Refund Policy for details.
Is Grosmimi BPA-free?
Is Grosmimi BPA-free?
Yes. All Grosmimi bottles and cups are made from 100% PPSU plastic, which is completely free of BPA, BPS, and phthalates. PPSU is the same material used in medical-grade equipment.
Where is Grosmimi made?
Where is Grosmimi made?
Grosmimi products are designed and manufactured in South Korea. The brand is one of the most trusted baby bottle brands in Korea, widely used in Korean postpartum care centers.
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- AGAlison G.Verified BuyerReviewingGrosmimi PPSU Straw Cup - 6oz (6 Months+)I recommend this productBaby's Age 6 Months - 2 YearsBaby's Height Under 26.5 InchesRated 5 out of 5 stars6 months agoFinally The Cup I've Been Looking For!
I was so happy to find this cup. My little one is just learning to drink from a straw, and this cup is the perfect size and shape. She actually got some water up with this straw, when we've been unsuccessful with many others.
- OAOzlem A.Verified BuyerReviewingGrosmimi PPSU Straw Cup - 6oz (6 Months+)I recommend this productBaby's Age 6 Months - 2 YearsRated 5 out of 5 stars6 months agoMy baby loved it🥰
Such a great product! Simple, well-made, and works perfectly for our needs. Very happy with it 🤍
- SSoyoVerified ReviewerReviewingGrosmimi PPSU Straw Cup - 6oz (6 Months+)I recommend this productBaby's Age 6 Months - 2 YearsRated 5 out of 5 stars7 months agoAbsolute best toddler cup
We love this straw cup. It is 99% leak proof, which is great with us. Other cups that say they are leak proof actually leak way more than this cup. This cup helped us wean our toddler from the bottle because she could lay in bed and drink milk from this cup. Then we transitioned to giving her water in this cup before bed and she stopped wanting milk to go to sleep. Amazing!
- MmichelleVerified BuyerReviewingGrosmimi PPSU Straw Cup - 6oz (6 Months+)I recommend this productBaby's Age 2 Years - 8 YearsBaby's Height 31.5 Inches to 36.5 InchesRated 5 out of 5 stars12 months agoToddler Fav
My toddler loves it and we are considering buying more!
- MBMeghan B.Verified BuyerReviewingGrosmimi PPSU Straw Cup - 6oz (6 Months+)I recommend this productRated 5 out of 5 stars1 year ago5 Stars
I was struggling with the idea of transitioning my toddler from a bottle to sippy cup, but after recieving and using these cups I’m confindent I found the right one! The product is very high quality and the color is cute. Much more attractive than all the other sippy cups ive seen . Purchased 3 more after using my straw cup for one week, coverting everything .
