> I have no idea how you could make a mess when refilling them. The refill bottle design is amazing. For example, if you remove the lid and hold the bottle upsi

> I have no idea how you could make a mess when refilling them. The refill bottle design is amazing. For example, if you remove the lid and hold the bottle upside down, nothing comes out. They only empty while attached to the printer tank. I just looked at the design of a newer EcoTank printer [1] and yes, it looks like you're right that the design has improved over the years. The L455 model I mentioned in my comment has an older design [2]. It's also a 6-7 year old model at this point. [1] https://www.youtube.com/watch?v=xh_GcP6oLhc&t=333s https://www.youtube.com/watch?v=xh_GcP6oLhc&t=333s [2] https://www.youtube.com/watch?v=eFdjla9Kmvo&t=103s https://www.youtube.com/watch?v=eFdjla9Kmvo&t=103s