Pink and Blue Tie Dye Slip Collar - Glow PupsPink and Blue Tie Dye Slip Collar Glow Pups This Pink and Blue Tie Dye Slip Collar is made from natural cotton, these collars are hand dipped in dye to create a beautiful combination of colors. It comes in a variety of colors: Yellow Blue, Rainbow, Pink Blue, Orange Blue, Yellow White and Green White. Pink and Blue Tie Dye Slip Collar. Pink and Blue Tie Dye Slip Collar has durable construction made with high quality materials for long lasting use.