Bought a small back pack but unfortunately don't remember where I got it. Called an "ALPS Mountaineering" pack. Has two plastic bottles in mesh holders, one on either side. I am diabetic so fill one with orange juice and the other with water. Has two zippered pockets with lining that would probably keep rain out except for heavy stuff. Also has an adjustable, open at both ends, carry pack on the outside back of the pack where I usually hang one of those lightweight rain jackets or other extra clothes depending on the weather. Plenty of room for all kinds of "stuff" including a small lunch, "skeeter" spray, fishing "stuff," and other goodies. Doesn't weigh that much and doesn't get in the way when casting etc. The pack is also padded where it touches your back and the straps are padded too. Like it a lot better then any other one I've had. Didn't try searching for "ALPS Mountaineering" pack but may be able to find one that way.