Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Reliability is the issue

I bought 3 sets and two lids wouldn't keep sealed until I realized that after pumping you should release the pump"s handle before detaching the tube don't relase the tube from the top of the canister first. Now I have one lid that doesn't work.I thought these were Microwave safe and believe me they are NOT! So I've not lost a small canister. Now I have an extra lid and canister (MED). Anyone have the oposite?