lids would not seal tight [SEP] first i love the look of the blue glass bottles they looked so nice until i filled them with liquid i used these to mix up a homemade bug spray using essential oils we were going on vacation and needed to take bug spray with us after i filled the bottles i put the tops on and noticed they leaked when turned upside down so i tried to tighten the lids a bit more while trying not to overdo it on the plastic tops and over tighten i was never able to screw the tops on and keep them from leaking very disappointing when you are trying to pack them for a trip i guess they would be fine if you know you are going to be filling them and they will stay upright