1. A misnomer created by marketers that have never been within a 20-foot radius of a toddler;
2. A term that should not be confused with “squeeze-proof”;
3. A product guarantee immediately viewed as a challenge by, er, precocious children;
4. The reason I had to change my clothes and my daughter’s clothes, as well as stuff the entire stroller in the washing machine this morning.
“Look at how drenched your child is! You must have given her a spill-proof smoothie.”