The best tip up for the extreme cold! Frozen over holes can be common when you are using tip-ups and the Trophy Thermal Tip Up from Clam is the solution - a thermal foam liner that is completely sealed for durability.  The Clam Trophy Thermal Tip Up now features an upgraded bearing drive system for incredibly smooth operation. Large enough to fit over a 10-inch hole! Includes a rigid red flag for maximum visibility from a distance and stacks inside a 5-gallon bucket.