Kordon/Oasis (Novalek) SOA80630 All Weather Ferret Water Bottle, 16-Ounce All weather ferret bottle is ideal for ferrets of all ages Designed with the angled cap and standard 7/16-inch diameter stainless steel drinking tube Drinking tube features double ball point vacuum valve Also features pink floating plastic ball that indicates water level at a glance Available in 16-ounce size