Ice-Pack Replacement for the C-20 and C-50 Ani Mate Small Dog/Cat Feeders Replacement Ice Pack for the C-20 and C-50 Small Dog/Cat Feeders. C-20 takes one ice pack and the C-50 takes two. The ice pack will last 8-12 hours after removal from the freezer. Ice Pack Measures 6 1/2" x 1/2" x 3 1/2"