You can use dive to help you optimize your Docker image layers. Say you have these two layers in your Dockerfile: RUN wget http://xcal1.vodafone.co.uk/10MB.zip -P /tmp RUN rm /tmp/10MB.zip Then you’ll end up with 10MB of wasted space. dive will tell you, so that you can combine these into one optimized layer: RUN wget http://xcal1.vodafone.co.uk/10MB.zip …