Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless

Got these as part of a little gift-set. They are hard to open and close (especially closing after filling the tea), the twist close did not always produce a tight seal so you risk having loose tea in your mug. The chain broke off after the second use (not really that big of a deal, more inconvenient). After the third use it became so difficult to open I just threw it away.