The Disneyland resort has released 4 resort exclusive designs for reusable shopping bags as part of its effort to eliminate single use plastic bags:

Quote Originally Posted by Disney Parks & Resorts

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At Disneyland Resort, Guests will find four bags one each for Disneyland park and Disney California Adventure park; a bag for Downtown Disney District and Resort Hotels; {in addition to the previous} World of Disney bag.

Available for a nominal fee and offered in three sizes, these reusable shopping bags are made of 80% recycled materials.
Current pricing is from recent Guest reports is $1 for Small, $1.50 for Medium, and $2.00 for Large.