A quick internet search found a company that makes fantastic crutch tips and accessories. The owner of the company is also on crutches. I have been ordering crutch tips from this company for many years (around ten) and have never been disappointed. These crutch tips are a bit pricy but they last me about a year. They have a special design that includes a shock absorber and the special "sole" that is adhered to the bottom of the crutch tip does not allow the water and snow to build up.
just ordered and received my newest pair of crutch tips, and not a moment to soon, as we are expecting 3-5 inches of snow tonight. Walking with these crutch tips is amazing and which is why I needed to share. It is almost as exciting as getting a new pair of shoes, almost! Here is the link to the website where I order my crutch tips. (I have also ordered hand grips and the pads for the top of the crutches.) If you are going to be on crutches for an extended period of time and do a lot of walking like I do, I highly recommend this company.