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According to a first aspect, a spray insert includes a sidewall and a first vane extending from the sidewall. The spray insert also includes an endwall including a discharge outlet. The spray insert further includes a first boss including a tip and a side to direct a fluid product toward a swirl cha

According to a first aspect, a spray insert includes a sidewall and a first vane extending from the sidewall. The spray insert also includes an endwall including a discharge outlet. The spray insert further includes a first boss including a tip and a side to direct a fluid product toward a swirl chamber. The boss is disposed on the endwall and extends from the vane. The side has a point of inflection.

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1. A spray insert for use with an aerosol container, the spray insert comprising: a sidewall;an endwall including a discharge outlet extending through a planar interior surface thereof;a first baffle disposed on the sidewall;a second baffle disposed on the sidewall, the second baffle spaced apart fr

1. A spray insert for use with an aerosol container, the spray insert comprising: a sidewall;an endwall including a discharge outlet extending through a planar interior surface thereof;a first baffle disposed on the sidewall;a second baffle disposed on the sidewall, the second baffle spaced apart from the first baffle to define a first longitudinal channel to direct a fluid product into a lateral channel; anda first boss disposed on the planar interior surface of the endwall and extending from the first baffle to define a portion of the lateral channel, the first boss having a tip spaced apart from the discharge outlet, wherein the first boss includes an airfoil-shaped portion to direct the fluid product in the lateral channel into a swirl chamber. 2. The spray insert of claim 1, wherein the first boss includes a base portion extending from the first baffle to the airfoil-shaped portion, wherein the base portion and the airfoil-shaped portion form a point of inflection. 3. The spray insert of claim 1, wherein the tip of the first boss is rounded. 4. The spray insert of claim 1, wherein a span of the lateral channel decreases from the sidewall toward the swirl chamber. 5. The spray insert of claim 1, wherein the airfoil-shaped portion is to direct the fluid product to rotate about a longitudinal axis of the spray insert when the fluid product is upstream of the swirl chamber. 6. The spray insert of claim 1, wherein the airfoil-shaped portion has a first side portion and a second side portion, the first side portion curved about a first axis of curvature, the second side portion curved about a second axis of curvature offset from the first axis of curvature in two perpendicular directions. 7. A spray insert, comprising: a sidewall;an endwall including a discharge outlet;a first baffle disposed on the sidewall; anda first boss disposed on the endwall to direct fluid product into a swirl chamber, the first boss extending from the first baffle, the first boss including a rounded tip, a first side portion, and a second side portion opposite the first side portion,wherein the first side portion has a first radius of curvature and a first arc length, and the second side portion has a second radius of curvature and a second arc length,and wherein the first radius of curvature is greater than the second radius of curvature, and the first arc length is longer than the second arc length. 8. The spray insert of claim 7, wherein the first side portion is to direct the fluid product into the swirl chamber, the first side portion forming a first point of inflection with a third side portion of the first boss. 9. The spray insert of claim 8, wherein the third side portion extends from the first baffle to the first side portion. 10. The spray insert of claim 8, wherein the second side portion forms a second point of inflection with a fourth side portion of the first boss. 11. The spray insert of claim 9, wherein the fourth side portion extends from the first baffle to the second side portion. 12. The spray insert of claim 7, further comprising a second baffle disposed on the sidewall, the second baffle spaced apart from the first baffle to define a first longitudinal channel. 13. The spray insert of claim 12, wherein the first longitudinal channel extends substantially parallel to a longitudinal axis of the spray insert to direct the fluid product into an oblique channel defined by the first boss and a second boss disposed on the endwall. 14. The spray insert of claim 7, wherein the tip is spaced apart from the discharge outlet. 15. The spray insert of claim 7, wherein the spray insert is to discharge a sheet of the fluid product that includes an air core via the discharge outlet. 16. A spray insert for use with an aerosol container, the spray insert comprising: a sidewall;a first vane extending from the sidewall;an endwall including a discharge outlet; anda first boss including a tip, a first side to direct a fluid product toward a swirl chamber, and a second side opposite the first side, the boss disposed on the endwall and extending from the vane, wherein at least one of the first side and the second side has a point of inflection, andwherein the first side and second side are curved and extend to the tip. 17. The spray insert of claim 16, further comprising: a second vane extending from the sidewall and spaced apart from the first vane to define a longitudinal channel; anda second boss disposed on the endwall, extending from the second vane, and spaced apart from the first boss to define an oblique channel. 18. The spray insert of claim 17, wherein the oblique channel decreases in width from the sidewall toward the swirl chamber. 19. The spray insert of claim 16, wherein the spray insert is to discharge a substantially conical sheet of the fluid product via the discharge outlet. 20. The spray insert of claim 16, wherein the tip of the boss is rounded.