Most of the regular western sodas are available, and many have local variants that aren't very different in taste. Pepsico, The Coca-Cola Company and even RC Cola fight for the soft drinks market aggressively. Israeli Coca-Cola is thought by Cola connoisseurs to be tastier and more authentic than elsewhere. This is due to the fact that Israeli Coca-Cola is made with sugar, and not with high-fructose corn syrup. Tempo not to be confused with Tempo Industries, Ltd. which is the brewer of most Israeli beer and bottler of most soft drinks including the local Pepsi and Super Drink are dirt-cheap local variants, at times sporting very weird tastes.
The generic name for Coke or Pepsi is "Cola", and it usually implies Coca Cola; if the place serves Pepsi, they will usually ask if it's fine. Also note that "Soda" generally means "Soda Water", and is not a generic name for carbonated soft drinks.
There are several more authentic soft drinks:
Cheap fruit flavor drink which is usually grape. comes in a tough aluminum-like bag with a straw. the bag is poked using the straw to make a hole through which you drink. a very portable drink until holed, which has become very popular in summer camps. in the newer varieties there is a marked area where the straw should be inserted. even then it can sometimes take practice to insert the straw without the juice squirting out, if you are from the us it is just like the israeli version of "capri sun."
There are a number of brands of sterilized chocolate milk sho-ko which comes in plastic bags and small cartons. the tip of the bag is bitten or clipped off, and the milk is sucked out. as with tropit, it is very portable although due to its milky nature, not as much until opened, after which it is impractical to reseal. it should be noted that chocolate milk in a bag is usually served cold, and it would be a very bad idea to warm it.