Instruct: Classify the given Amazon review into its appropriate rating category
Query: Lids are too stiff

We like the bento box (and so do our kids!) But these broke the first time we used them. The lids are really hard to snap on, and two of the lids cracked the very first time we used them. It's hard for the kids to get off and on. They are durable and dishwasher safe, however, which is why I didn't give a lower rating.