In most browsers the shorter and more specific variant of the code will run faster (in some instances much faster) than the second variant and so it makes sense to use the shorter and more specific version. It also makes the code easier to read and maintain.
In the United States and Canada frozen ice on a stick is generically referred to as a popsicle due to the early popularity of the Popsicle brand, and the word has become a genericized trademark to mean any ice pop or freezer pop, regardless of brand or format.
With most fountain pop, the syrup comes to the store/restaurant, and a CO2 tank carbonates the water, and it mixes together as you get the pop from the fountain. I'm pretty sure sparkling water is just the carbonated water. So, sparkling water doesn't have the calories and other additives from the syrup.