I had the kind with a plastic slider on the top - I hated using them & they didn't seal well and things got freezer burn quickly. These seem to seal much better and are much easier to use, and the silicone being really clear so you can see the contents easily is very helpful too. You can fit a lot more in them than you think, I've been using the snack size more than I thought I would. I wish they would offer the quart size individually - I don't understand why you can get every size except that one. Definitely recommend them
