Grosmimi: The Korean Baby Feeding Brand Parents Can’t Stop Talking About
If you’ve ever found a mysterious puddle at the bottom of your diaper bag, you already know the pain of a “leak-proof” cup that isn’t. That’s exactly the problem Grosmimi set out to solve — and it’s why this Korean brand has quietly become one of the most-loved baby feeding brands among parents around the world. Here’s everything you need to know about Grosmimi, and why we’re so excited to carry it at littlewild kids.
What Is Grosmimi?
Grosmimi is a premium baby feeding brand from South Korea, launched in 2015 by Gogreenlife, a company that has been developing baby products since 2004. The name has become almost synonymous with “straw cup” among Korean parents — it’s widely considered the go-to brand for babies learning to drink independently.
The brand’s philosophy is simple: feeding products should be safe, genuinely leak-proof, and designed to grow with your child. Every detail, from the silicone straw to the rotating handles, is engineered around how babies actually eat and drink — not how adults wish they would.
Why Parents Love Grosmimi
Truly leak-proof design. Grosmimi’s signature “+ CUT” system uses a cross-cut silicone valve that seals itself between sips. Turn the cup completely upside down, toss it in your bag, hand it to a toddler in the car seat — nothing comes out until your child drinks. For parents, this one feature alone is life-changing.
Safe, tested materials. Grosmimi cups and bottles are made from PPSU, a medical-grade, BPA-free plastic known for its exceptional heat resistance and durability. It can handle hot water sterilization, UV sterilizers, and the microwave without warping or degrading. The straws, spouts, and nipples are made from 100% platinum silicone, which is soft and gentle on little gums and teeth.
Designed to grow with your baby. This is where Grosmimi really shines. The same cup body works with interchangeable parts — nipples, spouts, and straws — so you can transition from bottle to straw cup without buying a whole new set. It’s a smart system that saves money and reduces waste.
Thoughtful little details. The rotating handles protect tiny wrists and make it easier for babies to hold the cup at any angle. The one-touch dome cap opens with a single press (and locks for travel). An air valve prevents pressure buildup, so there’s no spraying when you open the cup after a temperature change.
Our Favorite Grosmimi Pieces at littlewild kids
PPSU Straw Cup (200ml / 300ml) — The icon. This is the cup that made Grosmimi famous. The 200ml size with handles is perfect for babies around 6 months and up who are just starting on straws; the 300ml works beautifully for thirsty toddlers.
PPSU Weighted Straw Cup — Our top pick for straw-drinking beginners. The weighted straw follows the liquid no matter how your baby tilts the cup, so they get a successful sip every time — whether they’re sitting up or lounging back. Many parents tell us this is the cup that finally taught their little one to drink from a straw.
Stainless Steel Straw Cups — For older toddlers and warm Southern California days, the insulated stainless version keeps water cool for hours and survives endless drops on the playground.
Which Grosmimi Cup Is Right for Your Baby?
• Around 6 months: Start with the 200ml PPSU Straw Cup with handles, or the weighted straw cup if your baby is brand new to straws.
• 12 months and up: Move up to the 300ml size as your toddler drinks more.
• 2 years and up: The stainless steel straw cup is great for preschool bags and outings.
Replacement straw kits are available in stages, so you can refresh the silicone parts as your child grows instead of replacing the entire cup.
How to Clean and Care for Grosmimi
One of the most underrated features of Grosmimi cups is how easy they are to clean. Every part separates completely — cap, straw, valve, handle, body — so there are no hidden corners for milk residue to lurk. The wide-neck design means you can reach the bottom with a regular brush.
PPSU is safe for hot water sterilization, UV sterilizing cabinets, and the dishwasher’s top rack. We recommend replacing silicone straws and valves every few months with normal use, just as you would bottle nipples.
Where to Buy Grosmimi in the USA
Grosmimi can be tricky to find in the US, and parents often resort to overseas shipping or third-party sellers with uncertain authenticity. At littlewild kids, we carry authentic Grosmimi feeding essentials, shipped quickly from our store in Southern California — so you can shop with complete confidence.
Browse our Grosmimi collection at littlewildkida.store/collections, and feel free to reach out if you need help choosing the right cup for your baby’s stage. Once you’ve tried a truly leak-proof cup, there’s no going back.
