absolutely leakproof. glad i could buy a replacement lid because i carelessly sliced my old one with a knife, and even though it was still leakproof after that, it made me nervous.
Cost effective lid replacements!
I appreciate that your company offers lid replacement for all the silicon and steel products. Sometimes weird things happen and we accidentally lose a lid, but it's great we don't have to stop using the product and can get more life out of it!