We replaced out plastic containers with Glasslock glass containers. Initially, all worked well except it was an expensive switch. However, after few weeks of use, it was clear that there was black mold growing inside the leads (between the lid and the rubber tubing). Initially we thought it may be our fault however, it is very clear that this is flaw in the design because once you wash the lid, water seeps in side and grows mold over short time, Worst part is if you take the tubing out most of the time it breaks! And when you try to order replacement you have limitations on how many you can order. Not only that but Glasslock charge your ridiculous shipping fees to mail. Note, that you have to place multiple orders and I think Glasslock makes their money from charging more for shipping while "giving away" the lids!! Shame on the company for poor product, support, and lack of response to provide safe products! User's recommendation: DO NOT BUY GLASSLOCK PRODUCTS!! YOU WILL REGRET WITHIN MONTHS!