DETAILS: 1. Thecap consists of single closuerwithin anti-drift cap, the one can prevent the drift into the water inside the cover .. 2. Thiscap perfectly fits for 55 mm standard neck of bottles (5 gallon water bottles ). 3. Thiscap is made of 100% new PE material .Its diameter is 56 mm. 4. It has SGS certification. 5. The scoring made the cap easy removal from bottle. 6. We can offer different colors, such as natural, red, blue, green, yellow. 7. It is the third generation of bottled water cap ,meeting food and healthrequirements. 8.It also has anti-theft feature. Can do OEM service. wholesale to all over the world with good reputations....,,..