I use the glass containers for several months and they are very comfortable. They are liquid proof except for the 2 compartment container- it is not liquid proof between the 2 compartments. However I was very disappointed when I received my package and one of the lids was broken. Before even the first use a second lid was broken while I was closing the container. I wrote an email to Igluu but never received any reply. So good idea, but a lot of things should be improved- including communication. P.S. I really didn't received this email- probably it went in the spam folder. Could you please forward it?