Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Impossible to open

They seal well and I can close them (some force), however opening them is nearly impossible. We have all tried and have come to the decision that this must be a design flaw. The small lip is painful on your fingers. They really should have put a little finger lip that you could get your finger under or a slightly larger lip. Right now the lip just is painful.I have purchased some Rubbermaid serving savers which are much nicer to open and close.