Here is a nice training aid .... I came across at linkedin

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I would be sending that training aid back!

Too much head.

 

What's the matter, don't you like getting head of foam?

Wait, allow me to rephrase.

 

Yep, too much head for me........never thought I'd ever utter such words.

 

It is looking very nice training aids.

 

I think if the mug had been frosted, the ratio would be better...