Abstract Bottles

My first Drawing 3 project: Abstract bottles in chalk pastels.
Abstract isn't really my thing—at all. I really struggled with this project and I am not entirely sure how they turned out. Hah, I just don't fully understand abstract art and this was my first time using pastels.
These photos aren't that great, hopefully I can upload some better ones later...

Feedback welcome :) Especially if you have any tips on abstract art!