The water bottle below has been the best thing I've ever seen. You can make one pretty easily. I have also seen them made from PVC mounted with a screw on a board. They are easier to find now, so I'm not shipping anymore. They are very easy to make, if you are clever with wood.

A selection of brushes we use.
Front View	Side View
Back View	Parker Pawsing for a Drink

Travel and sleeping Crates and Water Near by for when Mom and Dad are home, incase we just want to snooze.. We now have tents and beds everywhere!	One of our pens, where they stay when no one is home. Now we have individual smaller ones.