Feed in the enclosure moving forward. There is absolutely ZERO benefit to feeding in a separate tub.
A) you're more likely to have refusals due to the snake being stressed from being moved.
B) You increase the chance of the snake regurgitating it's meal due to being moved after eating
C) you increase the chance of getting tagged as the animal will be in feed mode
Also, over handling in general can stress the animal. Especially after an enclosure change. Give your snake a little time to acclimate.