I can share my experience about Supplement Shop (Supplement Shop - Quality Supplements, Total Wellness | Singapore Online Supplements & Sports Nutrition). I placed an order and requested for the delivery for the next day. I got the confirmation the delivery will happen between 12-5 on the next day. I waited the whole day. I called their office at 3pm but I got their answering machine. I emailed them that night to ask for an explantion. Up to now, they have not replied.
I have to agree unfortunately. Mine recently did a fountain on the first shake. It was spectacular. The clean up wasn't.I feel that most of all these free shakers freebies are arguably low in quality. The cap is prone to leakages and you got to press onto the cap when shaking just to prevent leakage.