I'm trying to plot a confidence interval range of a forecast but the only way I can do this is with those ugly error bars. I want to have some kind of cloud or area between upper and lower confidence interval lines.

For example, this is my data:

data lower upper
1 0.9 1.1
2 1.8 2.2
3 2.7 3.3
4 3.6 4.4
5 4.5 5.5
6 5.4 6.6
7 6.3 7.7
8 7.2 8.8
9 8.1 9.9

I can use 3 different series but how do I fill the space between upper and lower?