Nube means cloud. So you can easily guess that Nube doble means two similar clouds.
Also the cloud is a part of almost everything on our computers these days.
And finally, nube reminds me my roots.
In Malaga, where I was born and lived for 25 years, a "nube doble" is one of different ways to order a coffee. Nube is much weaker coffee with milk (aprox. 25% coffee, 75% milk)
This is one of the things I like the most about Spanish language; the variety of lexic, how the same word could have a lot of different meanings.
Here, apart from offering Spanish lessons online, I will share my experience in the classroom (the virtual and the university one), things that inspire me and materials I create to learn Spanish in the blog.