Review on Plastic Smoothie Containers: Versatile and Durable Glass Bottles by Ronnie Polk

I bought them with the intention of storing my homemade juices and they do a good job for the price. The glass is thick and high quality. However, the tops are not easy to unscrew and do not fit 100%. I often find that they screw in crookedly and it takes several attempts before I can assemble them correctly. This is also why I noticed leakage from the top when swirling my juices before using. It's definitely not as airtight as we'd like. I'll probably look into hermetic options, but for a reasonable price, they definitely work for now.