The pellet version is steady it's easy to remove bottom from top to clean
water version, steady, easy to remove top to clean it ,it actually do let the water gently out and you can remove bottle without it running out, remember to fill It properly, do not place it in the sun or a hot places it will give alge or damage it
dimensions base is a good humanfoot with a bottle in same height as the base is long, DO NOT use heavy cleaning products or rough materials like sponges to scrub will damage the protective coating on it, you do needa a soft hair bottle cleaner brush