Bunny care tip: A frozen 16.9 oz (500mL) soda bottle filled to the top of the label, wrapped in paper towel and nestled in wood shavings on two sides for insulation will still be half frozen after 10 hours at 79F (26C).
Edit for more temp and frozen water bottle time:
A frozen 16.9 oz (500mL) soda bottle filled to the top of the label, wrapped in paper towel and nestled in wood shavings on two sides for insulation will be 60F (15.5C) completely melted but cool to the touch after 13 hours at 81F (27C).
