Great Material - Ldpe Body for Flexibility, Resilience and Impact Resistance, Stress Cracking, Resistance To High Temperatures and Deformation In Most Solvents. Wash Bottles Are Lightweight and Portable. Easy To Use, Just Squeeze The Bottle. . Convenient Use - You Can Easily Measure How Much Liquid To Put In The Bubblers As There Are Lines That Say Ml So You Don'T Create Waste. and The Spout Can Be Cut To Increase The Flow of Washing or Other Liquids. . Nice Seal - 1 Set Contains 2 Pieces of 500 Ml Bottles. They Are A Tight Sealing, Polypropylene Screw Cap With An Angled Stem and One Piece Draw Tube for Leak Proof Applications. The Narrow Tip Enables Precise Watering Position and Watering Volume. . Widely Application - Squeeze Bottles Can Be Used for Washing Labware or Cleaning Body Tattoos. Also Suitable for Storing Washing Solutions and Germicidal Solutions. Handy Tool for Tattoo Artists, Plant Lovers, Lab Stuff, Hairdressers, Etc