I sent my cards to get them professional printed at www.makeplayingcards.com. I chose to use plastic as the material for the cards. As my game involves water and paint, using plastic cards would protect the cards in case there was an accident i.e. spilling water. ensure the durability of the cards.
Previously, the original paint bottles for the marbling paint was not easy to pour. I decided to purchase some dropper bottles so that I could improve the user experience during the gameplay. The bottles were plastic instead of glass, so that it would be safer to use. I designed some labels to paste onto the bottle to create my own branding for the bottles. A piece of transparent sticker was pasted on the white stickers to further protect it from water.