Yup. Digging around, I found data on the ones they sold in small boxes in groceries:
stock number:
77392-0001
inner upc: 0 11125 77392 2
outer upc: 0 11125 77392 2
size: N/A
description: 24/40CT 7.75IN FLEX STRW BOX
material: PLASTIC
design color: RED AND BLUE STRIPE
effectivity:
product line: STRAWS AND CUTLERY
package dimensions: depth - 0.875
width - 3.75
height - 8.25
They also made them in a straight variety:
stock number:
77282-0001
inner upc: 0 11125 77282 6
outer upc: 0 11125 77282 6
size: N/A
description: 24/50CT 8IN STRAIGHT STRW BX
material: PLASTIC
design color: RED AND BLUE STRIPE
effectivity:
product line: STRAWS AND CUTLERY
package dimensions: depth - 0.875
width - 3.75
height - 8.25
Solo's trademark registration for Carnival expired in 2005. Brand name used since 1952. Solo still seems to offer straws as part of their Sesame Street cups/lid/straw packages. Solo's foodservice catalog has about 3 pages of listings for straws. Solo also sold a lot of straws in plastic bags under their own name, but I have not seen those lately, either.
Somewhere in NJ there has to be a bodega or mom-and-pop grocery that still has boxes of those straws faded by the sun.