The Only Truly Leak-Proof Sippy Cup We’ve Found (and Loved)
April 13, 2025
After trying three other sippy cups and nearly giving up, we found the one.
For years, I assumed leak-proof was just a marketing buzzword—until I found the B.box Sippy Cup with Weighted Straw. Yes the other cups I tried with my first child were leak-proof when the cups were dropped but they would ALWAYS leak when the contents warmed up, leaving gross milky puddles!
Why We Gave It One More Try
With our first child, we went through:
- Dr. Brown’s Sippy Cup – leaked constantly
- Munchkin Straw Cup – worse leaks than Dr. Brown’s
- Munchkin Miracle 360 – no leaks, but felt unnatural for teaching drinking
So when baby #2 came along, I was hesitant to try again. But I was determined to find a cup that wouldn’t leak—even when the contents warmed up.
Enter the Bbox Sippy Cup
We’ve now used it daily for 6+ months and:
- It has never leaked (not once!)
- We’ve used it with milk and water
- It’s rolled around in diaper bags, been upside down in the car, and thrown 20+ times
- Still no cracking, no dents, no discoloration
- The weighted straw = fuss-free toddler
Travel-Ready and Toddler-Approved
We use the Horizon Organic Room Temp Milk on the go and just pour it into the B.box.
The handles make it easy to grip, and it’s our go-to for weekend outings, travel, and everyday life.
Cleaning It? Easy.
Cleaning takes 3 minutes, tops. We use a straw brush, and there are very few parts, so no mold traps.
It’s a sippy cup—so yes, slightly more annoying to clean than a regular cup—but this one is well-designed and manageable.
Final Verdict
💯 No leaks
💯 No weird learning curves
💯 No breakage
💯 Worth every penny
Affiliate Link & Product Info
If you’re tired of the leaks and puddles (especially gross milky ones)—this is the cup to try.
Here’s the version we use and recommend:
This post contains affiliate links. If you purchase through them, we may earn a small commission—at no extra cost to you.