I felt the same with my wife, the infantile thing is hard to get passed.
I got her these…
They are durable, we’ve replaced them after a couple years, they dent but don’t break.
I thought I did great finding her an adult cup… she calls them her “sippy cup”.
Sounds great! Id recommend sticking to vegan proteins, e.g. brown rice protein. Its far healthier & cleaner as it doesn't have lactose/milk in it. Heres what I use, it tastes great. But make sure you get enough exersize to use it properly, or youll have farts like a space rocket:
https://www.amazon.co.uk/dp/B002IKKRYO/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=2YCJ0P2LP918P&coliid=IH0W91T00DL9N
Absolutely recommending Huel to everyone, whether you have it or not. I wish I could give out discount vouchers or something to get everyone some, I will contact them and see if theyd be up for that, Il let people know on this thread.
Thanks :) I hope it helps