system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do pills come in different shapes?
gpt
First of all, there are different kinds of pills.

* There are pills containing mostly calcium - these doesn't taste bad, and are therefore uncovered.
* Other pills are covered in a sugar to eliminate the bad flavor.
* Some drugs need to work fast, and are therefore in powder shape, sealed in a thin shell that rapidly dissolves in your stomach. 
* Some can be chewed 
* Some doesn't even go in your mouth ;-)

Pills are designed, just as every other product in the world. It's business, and to be the best, manufacturers are of cause competing to make a pill that is:

* Cheap
* Good looking
* Easy to swallow
* Effective
* Taste neutral, or even good flavored
* Easy to manufacture
* Keep to certain laws and guidelines..
* Long lasting

**Edit: Formatting**