A little too floppy when not full
Dont go with the big size unless you have an absolutely massive dog (or dogs). The large holds about three liters or water, and holds its shape well when full. It also packs super small. The only real drawback is the soft rimwhich needs to be stiffer to hold its shape well when the bowl just has a little food or water left. I found it be too floppy in general and traded for something stiffer.