ThirteentailsGetsFat:
Chocolate syrup makes it more palatable for me, and chocolate milk or just outright mixing it with a premade chocolate shake (from say, like, McDs) is even better.
When it comes to heavy cream, though, I really have to recommend a funnel of some variety. It's infinitely more "drinkable" when you can just down an entire quart in about a minute. There's a funnel out there that's marketed to partiers for beer chugging called the Chuggler, and I can't recommend that thing enough for solo feedee fun. When I'm really trying to blow up quickly, I use one to funnel heavy cream shakes right before bed, which lets me consume an easy 4,000 calories in a minute or so. It's super rad.
How about a funnel gag? I would love to have my hands free from holding a bong upright, They might also be bound rendering me helpless to the fattening liquid that a feeder would use.