A multiple chamber stackable cup or bottle has an air space separation between the chambers. A rotatable cap with a single sealable spout pivots to access each chamber individually. Alternately, a stationary cap has multiple sealable openings, one for each chamber, which communicate one chamber at a time or can be placed to bridge both chambers to allow access to both chambers at the same time. Tapered bodies enable the multiple chamber bodies to be stacked in a nested array.