I have had several that I liked but all the cheap ones the zippers were junk and didn’t last even one year. I now have a Camelbak MULE low rider. I love it, but the cheapest I have seen it is $75. The low rider has a wider bottom, and a wide low bladder to keep the weight low. Here is a link to the regular MULE at Amazon for $66 MULE
For $60, you’re not going to find what you’re looking for. Unless you stumble on some massive sale…
even then, you’re hard pressed to do better than an Osprey pack.
The Osprey Raptor line is one of the best packs for the $$. High quality construction, great functionality, and a lifetime warranty (even on the bladder). I had to have the bladder clip warrantied on one of my Raptor packs and it was quick and easy.
Consider ditching the pack. Instead, attach your gear to your bike. Ditching the pack was one of the best things I ever did when it comes to biking. No more sore shoulders and back. No more sweat soaked shirt, backpack, and back. Riding in warm weather is so much cooler. Get a water bootle cage and some sort of bag that attaches to your bike. You will be glad you did.