The Basket of Arcana Mana

Mike Kern submitted a basket of three slices of multicolored glowing bread that grants the consumer to cast any second level spell they already know for free without using a slot. Each slice could be shared with the different members of the party however due to the mass amount of magic preservatives and gluten in the bread they are weighed down and sluggish, must take disadvantage on any role involving movement so acrobatics stealth etc while it gets digested. There's only three uses of it so from my understanding I just want to make sure I do still want this but each slice can be shared with everybody or is there a maximum amount of people I could share the slice?