AVI Global Plast Pvt. Ltd. Supplies Collar Butterfly for Shirt Packaging. AVI Global Plast Pvt. Ltd. Is the manufacturer of shirt packing materials [collar bands & collar stays] and rigid PVC films respectively. Collar Butterfly for Shirt Packaging is used to lift the shirt collar. Collar Butterfly for Shirt Packaging is suitable to the radius, thickness and depth of the shirt collar. These are available in the range of bubble butterfly which helps to lend additional support and lift to the collar and the elongated butterfly also helps to strengthen the collar, reducing chances of any damage during transportation.