Are these any good? Lbs

My friend told me about them said they are a MUST have !!

i heard it spills lol and that milk goes bad alot quicker

@babybishop2015 definitely going to look for one see if it works for me thank you

@january10th, online I have one but not sure if it works.

I have no clue but I want some of those for sure where can I find them?