If $ is tight, quite a few different Schrade models will fit the bill as well, under $20
Sch106 models come to mind, msrp for around $20 and can usually be found for around $10, great little cheap beater blades, lightweight (definitely under 3oz.), aluminum or g10 handles with deep pocket clip, you absolutely get a lot more knife then $10-15 worth compared to the bigger brand names... I like to throw them in my online shopping carts whenever I'm just short of the free shipping limit, and give them away as gifts; pay $6-7 shipping, or buy another $10 knife and get free shipping? I go for option B every time, and no complaints yet. My mom even edc's a 106alc (coloshift) I gave her a while back. Serves her well.
A few other models too:
SCH211-212-213-214-217-218
Don't be scared off by the price tag, in my experience Schrade makes the best cheap blade...
(Whatever you do though, in your price range you are more then likely buying a Chinese production knife, just don't buy anything that doesn't have at least 7cr17mov or 8cr13mov steel from a reputable maker; the 3cr crap that Kershaw uses in some of it's $20 models like the duck commanders, kabar warthogs use it, coast uses it in some low end models, the carbon level is so low in that steel I have tin foil that stays sharper longer then those knives... Maybe good for a stainless axe, but not a small edc blade you want/need to hold a cutting edge.)