In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

To use the CamelBak coupons on their website, you need to meet the conditions:

•  The items you choose must meet all coupon requirements as explained in the Terms and Conditions.

• The coupon has not expired. 

• The seller uses the CamelBak checkout system or a customized checkout system that accepts the coupon.

Discount codes don't stack. If you have 60% off discount, they can't also use a "free shipping" coupon since Only one discount at a time can apply to a single order at the CamelBak site.

Normally, one discount code is only applied for one offer. However, If the users put a vast of items in their cart, it is easy to use one coupon code to purchase items. It depends on CamelBak's policy, you can contact CamelBak via mail for your reference.

Shoppers can get coupons for their first purchase at the store. However, it is not all the time, sometimes, they cannot apply a discount on items selling out or items not contained in the promotion program. It depends on the time you shop at CamelBak.