Doesn't create a seal and not travel friendly
This pink (not red) cup lid is a flat piece of silicone that sits on the top of the cup. Actually, mine arrived bent over on one side and does not straighten out. There is no way this lid snaps on nor does it fit securely, though according to AI Rufus it "transforms any regular mug into a travel friendly option" and has "practical spill prevention." I tried pressuring it to see if I could create a seal but it's a soft silicone and just crumples into the cup. The removable round knob on the top to lift the cover comes off fairly easily when handled. If your lid arrives flat you could plop it onto your cup and it may keep your drink warm or at least dust free. This one is functionless.


