Roborovski hamsters are the smallest of the dwarf hamsters, with high energy levels and a fast metabolism. Their tiny size means they need a water bottle with a very small, easily accessible spout that delivers water without dripping, as they can easily become dehydrated. Our editorial team compared the most popular water bottles on the market to find the ones that fit a Roborovski’s specific needs, from spout size to mounting stability in a cage with shallow bedding.

We focused on features like a leak-proof valve, a small ball bearing that even a tiny tongue can depress, and a capacity that doesn’t require constant refilling but isn’t too heavy for a small cage. Here are our top picks for keeping your Roborovski well hydrated.