These bottles have a large screened writing patch for content identification, eliminating the need for manual label application. They feature a no-drip pour lip. Polypropylene caps with PTFE faced foamed polyethylene liners are pre-attached. Sloping shoulders allow easy filling, cleaning and safer pouring without surge. The bottles are manufactured from Wheaton "400" borosilicate glass (meets USP Type I standards) to help prevent changes in pH levels and maintain content purity.