Hudson Exchange 1 Gallon Square Plastic Jug with Cap, HDPE, Natural, 4 Pack: Amazon.com: Industrial & Scientific
1 Gal 38mm HDPE Square Jug 1 case 4 jugs per case | eBay
Utility Jug 5 Gallon Square Clear ALL40120 - Allstar Performance
Qorpak® 128oz Natural HDPE Handled Square Jug with 38-400 Neck Finish, Jug Only, 4PK
One Gallon Jug (424 per pallet) - Toico Industries
1 Gallon BPA FREE FDA Approved Reusable Plastic Drinking Water Big Mouth "Dairy" Square Bottle Jug Container with Handle Holder For Gym Sports & Travel - (Blue) Made in USA - Walmart.com