any reason why you couldn't use a large ice coffee travel mug? They have a hard straw already in there and tubing could be attached. Anything I'm missing here? The price of dosing containers for what you get seems insane to me.
Also if you've ever washed them in the dishwasher could they be used if they are really rinsed well or start with a new one?
Also if you've ever washed them in the dishwasher could they be used if they are really rinsed well or start with a new one?