Pronounced: Gua (like guava fruit) – ter (as in tear a piece of paper) – o (same as the Oh in “Oh Susanna”)
What it is: A flexible bag that, when filled with hot water, is used to heat up a freezing cold bed. aka a hot water bottle.
I just bought this one today and it is already heating up my feet as I sit here and type. The best invention ever! My mom came in and wrapped it up in the little shirt-like thing because it was so hot. Nice try cold, rainy weather. My feet will be very happy now.