If you’ve ever watched a fancy mouse expertly carry a water bottle across its cage, you know hydration is serious business for these tiny athletes. Unlike bowls that can be tipped or soiled, a proper bottle keeps water clean and accessible. Our editorial team researched the best options for fancy mice, focusing on leak-proof designs, appropriate sipper tube sizes, and ease of attachment to wire or glass tanks.

Fancy mice have fast metabolisms and need constant access to fresh water, but they also have small mouths and can be prone to dental issues if the sipper tube is too large or requires excessive force. We compared real products from trusted brands to find bottles that deliver a steady drip without dripping on bedding, and that mount securely to prevent falls. Here are our top picks for keeping your mouse hydrated.