Daniel:

He will curse, smacking his face, asking himself how he could forget then did a back and forth motion, stuck between if he should go back or just return to you.

He ends up hurrying back to the store, telling himself the walk back is also a bonus to get extra movement in. When he gives it to you mentally he thinks 'better be thankful, so much work' but then smiles and the annoyance vanishes as he sees your excited look as you quickly take it.

Zack:

He groans but discards it, saying you can get it yourself if you truly want it that bad. But when he saw your upset face as you wanted it so bad and looked forward to it he felt guilty, and the longer you two hanged out after the more he felt so.

He ends up running to the store and coming back with the item, huffing you are better grateful. If you point out he offered to get it when you said your craving he fell silent then mumbled 'whatever, just enjoy this'.

Jay:

He will freeze right before he returns to you, realizing his mistake. If he goes back he will be gone so long you might get concerned, but if he comes to you without it then you'll be disappointed.

So he rushes to you, doing lots of hand figures and head pat as if to say "left brain" then rushes away; leaving you no time to properly process. By the time you figured out what he meant he was back with the item, panting but feeling succesfull.

Vasco:

He is a forgetful man, he thinks of it and then 'oh! A dog!' and then is distracted and forgets all else. Spends so long petting the dog so once in the store senses he's here for a reason but not sure so he leaves.

So when you complain that you were craving and waiting so long he gasped, acting as if he committed the biggest crime and begged for your forgiveness then ran off. He ran whole to store and back then held it to you with both hands and a look of sorry.

Jace:

He will keep repeating it in his head but then somehow forget once in the store as he began thinking of other matters.

So when you ask where it is he freezes then rummages through the bag, so sure he got it then rubs his face, groaning that he forgot it and that he's sorry. Sometimes he goes back to get it, other times he promises to get it next time he passes the store.

Johan:

He gets it but it's the wrong thing so you can't complain now as he did the work and tried. But at the same time really wanted the specific brand. He saw it wasn't right so he left. Then returned with the correct item.

Jake:

A lot of mental cursing, deciding how he will announce it as he reaches you. So when you ask where it is he nervously laughs then claims they didn't have it. So give him unimpressed eyes and he will admit "I forgot... I'll get it next time."

Gun:

Should have come gotten it yourself then. Is what he thinks while going back to get it for you. Damn annoying but when he sees your look of pure joy at seeing it it makes the going back worth it.

Goo:

Ah shiiit. He throws his head back, groaning and debating then decides you can go a day without it. So to get your forgiveness he covers you with kisses and asks you to forgive this poor foolish man.