Why Freezing Your Natural Rubber Teether Is a Terrible Idea

Jess
2026-03-24T12:55:53+01:00

I was standing in my kitchen at 2:14 AM wearing nothing but an oversized t-shirt and nursing pads, violently chipping ice off a rubber ring with a butter knife. My oldest son, Leo, was in the background doing that high-pitched, breathless screech that means a new tooth is actively cutting through his gums, and I was desperately trying to follow my mother's decades-old advice to "just freeze the dang thing until it's solid."

I'm just gonna be real with you right out of the gate: my mom is a smart woman who makes a mean peach cobbler, but her teething advice is absolute garbage. If you take one of those fancy natural rubber teethers you bought to be a good eco-conscious parent and shove it in your freezer next to the frozen waffles, you're going to destroy it and potentially hurt your kid.

I had to learn this the hard way. When you're a first-time mom running on three hours of sleep, you'll try anything to stop the crying, but that night ended with a cracked rubber toy and a baby who was absolutely furious that I tried to put an ice block in his tender mouth.

Why my grandma's freezer trick is actual garbage

thing is about pure natural rubber, which is usually harvested straight from the sap of a Hevea tree somewhere far away from my dusty Texas town. It's completely natural and porous, meaning if you toss it in the deep freeze to get that numbing effect everyone talks about, the extreme cold alters the material and makes it brittle enough to crack or snap, while also turning it into a frostbite hazard for your baby's delicate oral tissues.

My doctor, who usually just nods while I ramble about my anxieties, actually stopped me when I mentioned freezing our toys and explained that putting something rock-hard and freezing cold against inflamed baby gums can cause real tissue damage, similar to an ice burn. I felt like the worst mom on the planet for about five minutes until she patted my shoulder and told me to just use the refrigerator instead, because a cool, pliable ring provides plenty of relief without turning your baby's mouth into the arctic tundra.

So with a natural Kautschuk teether—which is what the Europeans call this stuff—the fridge is your best friend, but the freezer is completely off-limits unless you just enjoy throwing your money directly into the trash can.

The science stuff I barely understand

When Leo was little, I just bought whatever cheap plastic rings were on the end-cap at the grocery store, but by the time my third kid came along, I had fallen down the internet rabbit hole of toxic baby products. My doctor tried to explain all the chemical acronyms to me at our four-month checkup, throwing around words like poly-something-aromatic-whatever, but the translation I got was that a lot of those cheap plastic rings are full of nasty softeners and artificial antibacterial coatings that can actually breed resistant bacteria.

The beauty of a teether made from pure rubber sap is that it doesn't need any of that junk. It has no BPA, no phthalates, no PVC, and it's completely biodegradable, which makes me feel slightly better about the mountain of diapers I contribute to the local landfill every week. It's naturally soft enough to massage their little gums without bruising them, and because it's poured in one solid piece, there's nowhere for black mold to hide and grow.

Yes it smells like a literal tire shop

We need to talk about the smell, because the first time I ordered an unpainted, organic rubber teething toy and opened the cardboard box, I almost boxed it right back up and returned it. The scent of raw, untreated rubber hit me in the face like I had just walked into a Discount Tire on a 100-degree August afternoon.

I immediately called my husband into the kitchen, shoved the toy under his nose, and demanded to know if I had been scammed into buying a toxic dog toy for our infant. He took one whiff, recoiled, and confidently declared that there was no way we were letting our child put that stinky thing in their mouth. It smelled industrial, heavy, and completely unnatural to my brain, which was used to baby products smelling like artificial lavender or synthetic vanilla.

But after furiously Googling it on my phone while the baby napped, I found out that this aggressive tire smell is actually the ultimate proof that you bought the real deal. If your rubber toy smells like absolutely nothing, it's either plastic or it's been chemically treated and bleached to hide its natural scent. The intense rubber smell is completely harmless and usually fades after a few weeks of being out of the box and washed, though honestly, babies don't seem to mind it at all from day one.

And honestly, don't even get me started on those amber teething necklaces, which are basically just a choking hazard wrapped in a placebo effect anyway.

How I accidentally made organic rubber soup

If you take away nothing else from my chaotic parenting journey, please listen to me with cleaning these things. You can't treat natural rubber the way you treat silicone, which I learned when I tossed our first rubber ring into a pot of boiling water on the stove because I wanted to "sanitize" it after it fell onto the floor at the post office.

Ten minutes later, the water was cloudy, the kitchen smelled like a burning tractor, and my expensive European teething ring had partially melted into a sticky, gummy wad that permanently adhered itself to the side of my favorite pasta pot. Bless its heart, it didn't stand a chance against rolling boiling water.

You can't boil it, put it in the microwave sterilizer, or run it through the high-heat cycle of your dishwasher unless you want to destroy the cellular structure of the sap and render it totally useless. You literally just hold it under warm water, rub a tiny drop of mild dish soap on it, rinse it off, and let it sit on a towel to air dry. It will naturally darken over time, which looks a little gross as it turns brown, but that's just what raw materials do when exposed to air and baby spit.

Because natural rubber is so high-maintenance to clean, I rely heavily on a mix of materials in my house to keep my sanity intact. I keep the rubber one at home where it's safe, but for errands, my absolute favorite lifesaver is the silicone squirrel teether. I bought it on a whim, but it lives permanently in my diaper bag because the ring shape is super easy for my youngest to grip, and when it inevitably gets chucked onto the floor of a public restroom, I can just throw it straight into the top rack of my dishwasher when we get home without ruining it.

If you want to look at some lower-maintenance options to mix in with your eco-friendly rubber toys, you can browse through Kianao's teething toys collection to find things that won't melt in your sterilizer.

I also tried Kianao's Panda silicone teether, which is super cute with the little bamboo detailing, but I'm going to be honest—the flat shape was just okay for my youngest kid when he was tiny and couldn't quite figure out how to maneuver it to his back gums. My neighbor's kid absolutely loved it, so every baby is different, but for me, the ring-shaped squirrel was the clear winner.

The great drool flood

Nobody prepares you for the sheer volume of bodily fluids that pour out of a teething baby. It's not a cute little trickle; it's a constant, steady stream of saliva that soaks through their onesie, runs down their neck, and causes these angry, red drool rashes in their chubby little neck folds that look incredibly painful.

When my middle child was cutting his top front teeth, I was changing his clothes four times a day just to keep him dry. I eventually gave up and started laying him on top of the blue floral bamboo baby blanket whenever we were doing tummy time or playing on the floor. At first I felt ridiculous using such a gorgeous, silky organic blanket as a giant spit-rag, but bamboo is naturally moisture-wicking and antimicrobial. Instead of him laying in a freezing, wet puddle of his own spit on his cotton playmat, the bamboo blanket absorbed it beautifully and kept his skin from getting that awful chafing. Plus, the floral pattern totally hides the wet spots until wash day.

The terrifying pull test

There's a catch to natural rubber being so wonderfully soft and gentle on sore gums. Once your sweet, innocent baby seriously pops those teeth through, they turn into tiny piranhas with razor-sharp daggers in their mouths.

Because the rubber is soft, a baby with actual teeth can bite right through it if they gnaw hard enough. You have to do the pull test every single time you hand it to them. Just grab the ring with both hands, give it a firm yank, and inspect it under a good light. If you see even a microscopic crack, tear, or sign of the rubber separating, you've to throw it away immediately. A torn teether is a massive choking hazard, and no organic toy is worth a trip to the emergency room.

Motherhood is messy enough without stressing over every little piece of plastic your kid shoves in their mouth, but knowing how to properly care for the good stuff genuinely makes the hard nights a tiny bit easier.

Before you go accidentally melting your expensive organic baby gear in a pot of boiling water, make sure you grab a dishwasher-safe backup or a breathable bamboo blanket to catch the drool over in the Kianao shop.

Messy questions you probably have about teething rings

Can I put this rubber thing in the freezer?

Absolutely not, unless you want to ruin it. Freezing natural rubber makes it brittle, meaning it can crack and become a choking hazard. Plus, my doctor told me that freezing cold items can seriously cause ice burns on your baby's sensitive, swollen gums. Just stick it in the fridge for ten minutes. It gets plenty cool without turning into a dangerous ice block.

Why does my new teether smell like a car tire?

Because it's quite literally made from rubber tree sap. The first time I smelled one, I almost threw it away because I thought it was full of chemicals. That aggressive tire smell genuinely means it hasn't been treated with synthetic fragrances or harsh bleaches. It fades after a few washes, and I promise your baby literally doesn't care.

When should I throw the rubber ring away?

The second you see a crack, throw it in the trash. Natural rubber is super soft, which is great for raw gums but terrible once they seriously have sharp little teeth. I do a hard pull test on it every single morning. If the rubber stretches and shows a tear, it's done. Also, if it gets super dark, sticky, and gross feeling even after you wash it, the material is breaking down and it's time for a new one.

How on earth do I clean this without melting it?

Learn from my mistakes and keep it away from heat. No dishwashers, no microwaves, no boiling water. I literally just run mine under the kitchen sink with some warm water, rub it with a drop of my regular dish soap, rinse it well, and leave it on the dish rack. It takes thirty seconds. If you boil it, it'll turn into a sticky mess that ruins your pots.

Are silicone or natural rubber teethers better?

Honestly, I use both because they serve different purposes in my chaotic life. The rubber ones are incredibly soft and my babies love the texture when their gums are just starting to swell, but they're high maintenance to clean. I keep silicone teethers in the diaper bag and the car because when they get dropped on filthy pavement, I can just sanitize them in the dishwasher with zero guilt.