Thank you for all your proposals! Currently we are preferring #26. This icon could easily serve as a stitched logo on the shirt's pocket. #28, #23, #22, #30 are really nice logos, but our first impression was that these would be more suitable for an oil-company or a petrol station. :-) Let your creativity work! Maybe you could come up with some fresh ideas? We are looking forward to seeing from you. ;-)