A 500 ml tall pet bottle can package compatible shampoo, conditioner, body wash or lotion. The larger pack size can suit products used regularly. Choose a closure that dispenses the formula reliably and assess stability in the filled container.

Match the pump to the bottle neck and confirm that its dip tube reaches the appropriate depth. Test it with your product's thickness. Check the amount dispensed per press and the ability to use the contents near the bottom.

Measure the available body height and circumference, allowing clearance around the shoulder and base. Check the label against a filled sample. Its material and adhesive should tolerate expected handling, moisture and contact with the product.