Made from food-grade, BPA-free silicone, FDA aprroved, silicone soft to squeeze and back in shape well, reusable, caliber 1″ easy to fill, cap easy to open by one hand, 100% leak proof, can put into your carry-on baggage, perfect combination to maximize use of your limited packing space. Different bottle color can stop any confusion of shampoo, conditioner and body wash etc. Besides also have 3.4oz email us please. Under the 3.4 oz / 100 ml lotion restriction for taking onto all airline planes.