Travel Water Cup
This cup is designed specifically for watercolor artists. It's incredibly thin (only 12 mm) and its maximum capacity is 270 ml. It is also retractable onto different levels, providing a variety of capacities from 150 to 270 ml.
Plus it can be used as a very small tank for ink for example.
Equipped with a strong stainless metal rim that is specially polished to not damage the brushes and the collapsable cup itself is made of a solid piece easy-to-clean, high-quality silicone. It fits easily into a folder, a bag, or just a pocket. The cup is equipped with a lid that fits very tightly and that not allow water to spill. Also, it is equipped with a leash for quick attachment to a bag or backpack.