Meg gets waste dairy product, mostly whey but the odd bit of milk (end of jug, old milk when I've just got loads of new, etc.) She was brought up with whey as a significant part of her diet and she loves it more than anything, even bananas. Milk she likes but not as much as whey - at first she wouldn't drink milk because it wasn't whey but she's got the hang of it now.
Because she knows what it is and loves it so much, there's no worry about a non-tippy container, it's been drunk with complete concentration within less then a minute! But when she has company I suppose I will have to think about two troughs... It wasn't a problem with Gaby, she preferred the nuts and wasn't a great fan of whey.