Review title is Cobalt blue glass is pretty and lids seem to screw on tight [SEP] This is my first purchase of essential oil drop bottles. Cobalt blue glass is pretty and lids seem to screw on tight. The plunger suctions up 1/2 a tube full of oil which I find a bit disappointing. For the cute lables, a chalk marker pen is needed and not included. My mini funnels fit narrow opening.