Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dangerous item- pressure build up

I have used many shakers in my day in both professional and home settings. I bought this shaker for my husband who wanted to try his hand at mixology. Not only does the top stick when you don't want it to (as other reviewers have noted) but the top SHOOTS off like a rocket when least expected. After shaking a drink vigorously, we have, on numerous occasions had the top burst off with a loud noise and land across the kitchen. Thankfully no one has been hurt, but we have yet to figure out why this top is so unpredictable.We do not recommend under any circumstances.