Loads of new drops tho day. I haven’t got an specific protein shaker, because I actually use my stainless double walled insulated tumbler, the same I use for smoothies or just water, sometimes for coffee. I got it years ago, and what I liked about it is that the lid closes nice and tight, it has an opening for a straw that you can close back, you can use ir for hot or cold drinks. I occasionally have protein powders, maybe twice a month or even less. So for me is not necessary to have an exclusive shaker. What I like about using my own tumbler is that I can easily wash it and then refill it with other drinks without the branding and it keeps my beverages either cold or hot. PS: Mine is not dishwasher safe, or leak proof :(