hmm, it doesn't show the same things as their catalog so i'll list it here and you can call them about it...

item # 35-122 Drip-it Pro Waterer...$13.95 32oz tank lasts for 2 weeks
(shown on page 75 of their most recent catalog mailer)

it's a green plastic tank with outlets for a steady drip that lasts for what they say, 2 weeks. looks good too...

a phone call to them will be much more help for you...1-800-427-3363