Rebalances ketchup

Previously, ketchup had nutritional stats appropriate for 1 serving per
1 volume, giving it 100 nutrition and 200 quench, and a weight of 5
pounds per per plastic bottle.

This tweak divides price, weight, and nutrition by 5 because there are 5
charges per 1 volume. It also nerfs quench because ketchup should not be
more satisfying than soda.