How much?

0.5 liters should make a diffrence

Having dessert after every meal and drinking soda instead of water
GOMAD (Gallon of milk a day) is also great
Boost VHC helps, too

They said practical. This is not practical. This will make you sick and you'll end up tapping out before you reach your full potential.

That said, wear clothes that you can comfortably expand in. Bonus points if they obscure your gain. You'll be able to eat more, keep your clothes for longer, and feel more comfortable gorging yourself often.

Eat Breakfast eat lunch eat dinner don’t deny yourself any snacks. Don’t underestimate your metabolic rate and how much you realistically burn off just from daily activity it adds up a lot of people are not fat only because they run calorie deficits. Lastly remove the concept of wanting to eat from hunger

I love ice cream and I even drink quite a bit of milk but I think the whole cream stuff is totally unnecessary, unpleasant and actually detrimental to consistent gains. Just eat and drink what you enjoy eating and drinking that you can keep down