ProgressivePrep Solutions by Brown Sugar Keeper with Air-Tight Lid, 1.5 Quarts

Is there a little triangle at the bottom of the container indicating #2 or #5 plastic? I think only #2 and #5 are both food safe and safe for reuse.

Are these freezer safe?

What is the plastics recycle number on the bottom?

The silicone seal keeps falling off of the lid. Is there something I'm doing wrong or a way to fix this?