Biodegradable Rubber Eco-Skip. Designed with a heavy-duty construction these durable Eco-Skip Feeders are produced from recycled tyres. Excellent for the Stable, yard and tack room environment, frost and sunlight resistant the Eco-Skip Feeders are non-toxic and ideal for equestrian, livestock and agricultural use. ColoursBlack, Blue, Green, Orange, Pink, Red and Purple.