BREAKAGE RESISTANT: Rigid breakage-resistant plastic body ensures long-lasting durability and reduces water drips caused by temperature fluctuations. PREMIUM QUALITY: Polished stainless steel drinking tube and stainless ball-point tip ensures a hygienic drinking experience. Double balls in each vacuum valve tip prevent dripping. SIMPLE TO MOUNT: Comes with a mounting bracket and "U" shaped wire holder for easy installation. PERFECT SIZE: The 4-ounce size small bottle is one of the best choices for an individual small, "pocket-pet" type animal. Great for both the home-cage and for travel carriers. EASY TO CLEAN: Wide mouth bottle with large opening allows easy access inside for cleaning. Opening is large enough for bottle brushes and makes it easy to refill.