I bought a bloody expensive (because I'm sophisticated
) 250ml bottle of pineapple, mango and coconut juice from M&S just so I could use the bottle as a nido mixer, got to say its worked a treat, lasted through the CWT and many walks since, goes in the dishwasher every time I get home and hardly looks any worse for it.
I just pour a wad of powder in the wide bottle mouth, add water and shake it like a maddie, no lumps, either add more powder or water to get my preferred taste. I tend to make enough for two or three brews at a time and just carry it around like a wee bottle of milk.
Daughter text me the other day to say she saw nido in sainsbury's for £3 and did I want a tin, she hasn't brought it round yet so I haven't a clue what size of tin it is