4 Bottles Fancy Large 30ml Roll On Empty Glass Bottles for Essential Oils Refillable 1 Oz Glass Roller Ball Roll-On 30 ml Clear Swirled Glass w/Upscale Teal Turquoise Aluminum Caps by Grand Parfums

These beautiful 1 oz, 30ml glass bottles are a handy way to apply essential oils, blends, and massage oils to the skin-simply roll them on as needed. These 1 fl oz (30 ml) Roll-on applicator bottles have a Large Resin roller ball, and are sturdy glass. You need to test any blends. Certain oils, like clove, black pepper, myrrh, mints, tea tree, lavender, citrus or frankincense can dissolve plastics. (the housing which holds the balls is plastic) And, very lubricating carrier oils, like coconut fractionated oils, cause the roller to get so lubricated, that they pop out of the housing. (this is only a partial list; this is so of all rollerball bottles,not just ours) Essential oils are effective because they have chemical properties. It is those same properties which create chemical reactions with certain other ingredients/materials. It is a scientific fact that some oils dissolve plastics, and are not a good fit with roller ball bottles for this reason.