PPSU Straw Cup
GrosmimiGrosmimi PPSU Straw Cup - 10oz (6 Months+)
Free shipping on orders $50+ · Ships in 1-3 business days
Quantity
About This Item
- - Take extra care when microwave heating
- Always stir heated food to ensure even heat distribution and test the temperature before serving
- - Straws are not suitable for a child under 6 months
- - Please read the information on the leaflet enclosed before use.
Why Grosmimi?
6 reasons parents choose this cup
PPSU Safe Material
FDA compliant material commonly used for medical devices requiring repeated steam sterilization. BPA Free.
Soft Liquid Silicone
Softness and smoothness of the teat and straw protect baby's teeth and gums.
Leak-Proof '+Cut' Straw Design
The + cut prevents leaks. 2-way use: with tube for sitting, without tube for lying down.
360° Rotating Handle
Handles rotate freely for a comfortable grip from any angle.
Stable Ergonomic Design
Wide-neck design makes the cup easy to clean and stable to hold.
Made in Korea
Manufactured by Grosmimi in Korea.
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.
✓ + Cut seals under pressure. No extra valves.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.
✓ Incredibly durable FDA-compliant PPSUOne Touch Cap
Open with one hand. While holding baby with the other.
Thumb-press flip cap opens instantly. Steel-free, anti-dust design keeps the straw clean between sips.
✓ One Touch Cap — steel-free, anti-dust360° Rotating Handles
Grip from any direction. No wrong way to hold it.
Handles rotate freely so small hands can grip from any angle.
✓ 360° rotating — grip from any directionSealed 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.
✓ + Cut stays sealed during motionPrecision Engineering
Built detail by detail.
Every element of Grosmimi's straw system serves a purpose. From the leak-proof seal to the 360° rotating handle — each detail is engineered to make drinking easy for babies.
- 1Leak-Proof Design — + cut valve prevents spills
- 2Cross Cut — silicone tip seals between sips
- 3Air Valve — regulates airflow for smooth drinking
- 4360° Rotating Handle — grip from any direction
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.
200ml
Compact, lighter, easier to hold
300ml
More volume for bigger appetites
← This productWhen 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.
What's Included
Everything in the box
Includes Stage 1 Straw Kit. Additional straw teats and accessories are available separately.
PPSU Bottle
FDA compliant
One Touch Cap
Steel-free
Silicone Straw Teat
Included
Handle
360° rotating
Silicone Straw Tube
Replaceable
Weighted Straw Kit
Any-angle drinking
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.
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.
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.
FDA
Compliant — used for medical devices requiring steam sterilization
BPA Free
Zero Bisphenol A in the material
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.
What Parents Say
What parents are saying
“My daughter finally drinks water on her own. The weighted straw was the game changer.”
Sarah M.
Baby: 9mo · Verified
“Switched after reading about microplastics. The PPSU difference is real — doesn't discolor after months.”
Jennifer K.
Baby: 14mo · Verified
“We're on our third Grosmimi — 6oz, 10oz, now the tumbler. Best cups ever. Zero leaks.”
David L.
Toddler: 2.5yr · Repeat buyer
Care & Sterilization
How to sterilize each part
| Method | Bottle (PPSU) | Cap (PP) | Straw/Teat (Silicone) | Weighted Bead |
|---|---|---|---|---|
| Hot Water | ✓ | ✓ | ✓ | ✓ |
| UV Sterilizer | ✓ | ✓ | ✗ | ✓ |
| Dishwasher | ✓ | ✓ | ✗ | ✓ |
| Steam | ✓ | ✓ | ✓ | ✓ |
| Microwave | ✓ | ✗ | ✗ | ✗ |
Tips: Replace silicone parts every 2-3 months, or immediately if torn. Hot water sterilization within 5 minutes. Always disassemble all parts before cleaning.
Certifications
Certified safe
BPA Free
No Bisphenol A in the PPSU material
FDA Compliant
Material used for medical devices requiring steam sterilization
Made in Korea
Manufactured by Grosmimi in Korea
Product Specifications
Product information
| Product Name | Grosmimi PPSU Straw Cup |
| Capacity | 10oz / 300ml |
| Dimensions | 100 × 70 × 188 mm |
| Net Weight | 116g |
| Material | PPSU (FDA compliant) |
| Temperature Range | -4°F to 392°F |
| BPA | Free |
| Includes | Stage 1 Straw Kit |
| Age | 6 Months+ |
| Country of Origin | Korea |
Policies
Shipping & Returns
Shipping
- Free shipping on orders over $50
- 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 13 reviews
would recommend
this product
Customer Photos
See it in real homes· 2 photos
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Sign In to Write a Review13 reviews
Diana
We like it very much ! My granddaughter is wmjoying using it for her milk no more bottles !!
Rajvi P.
Best bottle ever for my toddler!
I have been using this bottle for my toddler past 6 months and he loves it! Love that you can microwave it and its perfect for daily use!
Naomi
Love the straw cups!!
Naomi
Love the straw cups!!
Christine joyce D.
Looks great
