They usually leak around the net cups for a few days then stop, why I don't know. Also they really need to be level also or the lids will leak and also need to be rubbermaid roughneck totes the cheaper ones don't seal and will leak around the rim (from experience). I thought about takin one of the cheapies and making a super thin silicone bead around the top and see if that works but haven't tried it yet.