This little guy drinks a lot…or well only drinks – no eating – just fermented nectar for breakfast, lunch, and dinner. Check out the Wikipedia info:
The Pen-tailed Treeshrew is one of seven known wild mammals that chronically consume alcohol. A study of the treeshrew in Malaysia found that it spends several hours (approx. 2 hours) consuming the equivalent of 10 to 12 glasses of wine with an alcohol content of up to 3.8% every night drinking naturally-fermented nectar of the bertam palm. Despite consuming relatively large amounts of alcohol, the Pen-tailed Treeshrew does not become intoxicated. Measurements of a biomarker of ethanol breakdown suggest that they may be metabolizing it by a pathway that is not used as heavily by humans.