PPSU Straw Cup
GrosmimiGrosmimi PPSU Straw Cup with Flip Top - 10oz (12 Months+) Stage 2 Straw
Free shipping on orders $50+ · Ships in 1-3 business days
Quantity
About This Item
- New Collaboration Release: Knotted × Grosmimi — Cream Bunny, Smile, and Sugar Bear designs now available
- The cup comes with Stage 2 Straw kit(Recommended for 12M+)
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.
One-Touch Flip Top
Opens with a single press for easy on-the-go drinking. Locks shut securely.
Soft Liquid Silicone
Softness and smoothness of the straw protect baby's teeth and gums.
Leak-Proof '+Cut' Straw Design
The + cut prevents leaks even when the cup is upside down.
Easy to Clean
Wide-neck design makes the cup easy to wash and assemble.
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.
The flip top cup combines one-touch convenience with the same leak-proof straw system parents trust. Every detail is designed for on-the-go toddlers.
- 1One-Touch Flip — opens with a single press
- 2Leak-Proof Design — + cut valve prevents spills
- 3Air Valve — regulates airflow for smooth drinking
- 4Secure Lock — flip top locks shut in bags
Selection Guide
Start small, then size up.
The 200ml flip top is lighter and easier for toddlers to carry. The 300ml is ideal for longer outings or when your child drinks more volume.
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 2 straw teat. Additional straw teats and accessories are available separately.
Cup Body
PPSU or Stainless Steel
Flip Top Cap
One-touch open
Silicone Straw Teat
Included
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
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
Read
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Reviews
What Parents Are Saying
Based on 16 reviews
would recommend
this product
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Sign In to Write a Review16 reviews
Lauren
Handles dont stay in one spot, just keep spinning. Quality is ok.
BriAnn B.
SPILL PROOF
Finally a spill proof, leak proof cup! I have put it through all the tests. Warm milk, cold milk after being in fridge, dropping it, shaking it! It has not leaked through any of this. I could not be more impressed with this cup!
Iris P.
Straw cup
The cup is pretty and I love how soft the straw is. They are easy to use and my baby would drink milk out of it. The handle makes it easier for her to hold especially with the cold milk
Lee M.
Happy face
My son loves these. He thinks it's so cool to open them himself.
Easton G.
little one loving it
perfect size for my 1 year old
