Can any doc tell me what's the best protein supplement without needing a blender?

Blender bottle: we're not allowed to recommend a specific product. But, to solve your problem of no blender, consider buying a container with a blender ball inside of it. WIth these you can put your water or milk into the container, add the powder and simply shake by hand. The blender ball inside will "blend" the powder into the liquid. No blender needed!

Shaker cups: Most of the protein supplements I have tried will dissolve adequately with a spoon or you can get one of those shaker cups that have a spring or gadget in the cup that helps to mix the protein powder when you shake it.