Natural Cleansing System - For Vaginal Cleansing Use Only - the nozzle is 2 3/4" suitable for smaller ladies. This is the only one with a siphon here on Amazon. Latex-free for a non-allergenic experience, It's transparent.so you can see how much water is in it without opening it or shaking it to guess NON-ALLERGENIC due to the use of safe # 4 Plastic that won't cause irritation. This is a wonderful natural vaginal douche, Easy to use for better health and for the avoidance of vaginal odors or vaginal discharge. Excellent hygiene wash for women, this is compatible with DMSO/MMS NON-BPA & PVC MATERIALS designed for exacting American health standards.This reusable douche bottle is Eco-Friendly and UL Tested for safety and reliability. we posted the UL Test in our photos for your examination