A tote bag is perfect for daily use. A tote's roomy interior will easily accommodate your essentials plus a spare pair of flats.
If you'd rather not spend much, consider buying this Dooney & Bourke Tote Bag. It's a fantastic product for a reasonable price. Another wonderful option is this Street Level Tote Bag. While the price is not too high, be sure that this piece will become an excellent addition to your wardrobe. You might also want to consider this Tote Bag. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.