These are great, I use these in dieting so I can stay within a calorie deficit every day, and for my activity level and BMR, the volume is fantastic. The lids stick well for me, I also don't pack these full, I stop either right at or just below the upper most line of the bottom part.Value wise these things are awesome, beats out my local bulk store.They hold up fine in my 25 minute highway drive to work, I wouldn't go and toss one down the stairs and expect the lid to stay on, but for bulk meal prep containers I don't expect that of any of themThe review wants me to talk about stackability so I will. They stack fine, they are flat on top and bottom and don't crush, so that's good to go.If your trying to run calorie deficit and just want to pre prep some healthy meals these are what worked for me.