I apologize for the informal tone previously. Here are some professional options for 3-letter store products, categorized:
Grocery:
- Tin (canned goods)
- Jar (jams, spreads)
- Bar (soap, protein bars)
- Oil (olive oil, cooking oil)
- Yak (yogurt)
Pharmacy:
- Med (medication)
- Aid (band-aids, first aid kits)
- Balm (lip balm, ointment)
- Vit (vitamins)
Clothing:
- Tee (t-shirt)
- Hat
- Sock
Hardware:
- Nut (bolt)
- Key
- Nail
Remember, the specific products available will depend on the store’s focus.