K-9 Combo Cup
Proper hydration is a necessity for both you and your dog. The K-9 Combo Cup ingenuously allows you to share water with your dog without contaminating the water source. Fits any standard bicycle cup holder and most fanny pack cup holders. The human can drink from the straw and when your pet is thirsty simply remove the top, which is also a cup, and pour water for your pet.
HINT: Keep one in the car for those road trips too!
Very limited supply.