100 GLASS SAMPLE BOTTLES: In this set, you will receive 50 1ml amber glass bottles, 50 orifice reducer inserts and 3 plastic droppers. The bottles measure 2.5cm (0.98 inches) in height and have a diameter of 1.5cm (0.59 inches). They are made from durable glass, with plastic dripper inserts and black caps which won't leak. Both BPA and lead-free, these bottles are environmentally friendly, recyclable, reusable, and long-lasting. Non-toxic bottles that will preserve your liquid solutions. PROTECTIVE BROWN GLASS: The amber glass that these bottles are made from helps protect your light-sensitive products from harmful UV rays and volatilisation. They're also corrosion-resistant and shockproof for extra protection. Each bottle comes with a plastic screw-on cap and sturdy orifice reducer inserts, allowing you to evenly spread your oils/fragrances. The inserts are simple to remove, so you can refill your bottles or wash them with ease. FOR HOMEMADE MIXES: These bottles are perfect for storing and applying samples of your synthetic, massage, and other essential oils. Using the droppers you can accurately measure and transfer fluids for blending/mixing your DIY solutions.