The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test track. A tire graded 200 would last twice as long on the government test course under specified test conditions as one graded 100.
Most wine racks are designed to allow a wine to be stored on its side. The thinking behind this orientation is that the cork is more likely to stay moist and not dry out if it is kept in constant contact with the wine. Some wineries package their wines upside down in the box for much the same reason.
Use a spoon to hollow out the area inside the hole so that there is room for the entire neck of the bottle of vodka. To test the fit, put the cap back on the bottle and turn it upside down, inserting the entire neck of the bottle into the watermelon. Make sure it can rest securely in this position.