Abstract: Teething, imbibing, and entertainment apparatus and methods utilizing fluids, wherein such fluids may be room temperature, warmed, chilled, frozen, and/or partially-frozen. A fillable body allows a user to imbibe warmed, chilled, frozen, and/or partially-frozen fluids through one or more apertures. A plurality of chewable exterior features, protrusions, and nipples further aid in easing teething pain and/or entertainment. A detachable nipple allows the apparatus to be used with a variety of nipples having differing configurations and sizes. The handles facilitate holding of the apparatus by young users with limited motor skills such as infants and toddlers. The methods allow a child to chew on frozen liquids to at least partially thaw such liquids such that the chilled liquid and/or slush may be directed to the user's gums, teeth, mouth, and/or throat via aperture(s). Similarly, methods of directing a heated liquid to a child's gums, teeth, mouth, and/or throat are also disclosed.