Instruct: Classify a given review into positive or negative sentiment.
Query: Plastic Umbrella bases yuck!

We tried filling them with water at first that didn't work very well. So then we filled them with sand. That was a little better but the bases weren't heavy enough to hold the umbrellas upright in a steady breeze. We ended up getting rid of all of them and replacing them with preformed concrete bases. Those worked very well.