You can use any string/twine that is made from 100% cotton. Avoid anything synthetic at all costs. They will melt (very likely into your food). Please keep in mind youre probably paying a premium for anything called butchers twine, cooking twine or baking twine.

Also, what can I use if I dont have kitchen twine? Substitutes for Twine

Dental floss: Tie up your bird or bundle with dental floss. Aluminum foil: Roll up some aluminum foil into tight ropes and secure them around your food like bands. Toothpicks or wooden skewers: Poke toothpicks or wooden skewers into your rolled meat to keep the seam from unraveling.

Also, how do you truss a chicken with twine?

Place the chicken on its back with the legs facing toward you. Slide a piece of twine under the back of the chicken between the wings and the thighs. Pull both ends of the twine up under the chickens armpits, then pull them over the wings. Cross the string around the top of the breast, making sure the skin is secure.

Can I use regular twine instead of kitchen twine?

A common recommended alternative to kitchen twine is unwaxed dental floss, but it is so thin that while being tied on to a piece of meat it often cuts through it. After cooking, this whitish, almost translucent filament is all but invisible and so can be difficult to remove.